Update WHATSNEW.

.gitignore

@@ -4,12 +4,12 @@
 .gitignore
 MYMETA.json
 MYMETA.yml
-Makefile
 TAGS
 autom4te.cache
 blib/
 config.log
 config.status
+gmon.out
 man/rem.1
 man/rem2ps.1
 man/remind.1
@@ -18,6 +18,7 @@ pm_to_blib
 rem2html/Makefile
 rem2html/rem2html
 rem2html/rem2html.1
+rem2pdf/Makefile
 rem2pdf/Makefile.PL
 rem2pdf/Makefile.old
 rem2pdf/Makefile.top
@@ -30,8 +31,8 @@ src/rem2ps
 src/remind
 src/test-*.out
 src/version.h
-tests/test.out
-www/Makefile
-gmon.out
-tests/once.timestamp
 src/xlat.c
+tests/once.timestamp
+tests/test.out
+tests/tz.out
+www/Makefile

Makefile

@@ -39,14 +39,21 @@ install-stripped:
 	@$(MAKE) -C rem2html install
 	@$(MAKE) -C rem2pdf -f Makefile.top install INSTALL_BASE=$(INSTALL_BASE)
 
-test:
-	@$(MAKE) -C src -s test
+test: test-basic test-tz
+
+test-tz:
+	@$(MAKE) -C src -s all
+	@$(MAKE) -C src -s test-tz
+
+test-basic:
+	@$(MAKE) -C src -s all
+	@$(MAKE) -C src -s test-basic
 
 cppcheck:
 	@$(MAKE) -C src cppcheck
 
 distclean: clean
-	-rm -f config.cache config.log config.status src/Makefile src/version.h src/config.h tests/test.out www/Makefile rem2pdf/Makefile.top rem2pdf/Makefile.old rem2pdf/Makefile rem2pdf/Makefile.PL rem2pdf/bin/rem2pdf rem2html/rem2html
+	-rm -f config.cache config.log config.status src/Makefile src/version.h src/config.h tests/test.out tests/tz.out www/Makefile rem2pdf/Makefile.top rem2pdf/Makefile.old rem2pdf/Makefile rem2pdf/Makefile.PL rem2pdf/bin/rem2pdf rem2html/rem2html
 	-rm -f man/rem.1 man/rem2ps.1 man/remind.1 man/tkremind.1 scripts/tkremind
 	-rm -rf autom4te.cache rem2html/Makefile rem2html/rem2html.1
 

README.md

@@ -9,7 +9,14 @@ the GNU General Public License, Vesion 2.
 ### Remind and Rem2PS
 
 **remind** and **rem2ps** have no prerequisites beyond the standard C
-library and the standard math library.
+library and the standard math library.  **remind** will make use of
+GNU Readline if you have it installed.
+
+- On Debian-like systems, install GNU Readline as follows:
+
+    `apt install libreadline-dev`
+
+- On RPM-based systems, you need `readline-devel`
 
 ### Rem2HTML and Rem2PDF
 

configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.72 for remind 06.00.02.
+# Generated by GNU Autoconf 2.72 for remind 06.01.00.
 #
 #
 # Copyright (C) 1992-1996, 1998-2017, 2020-2023 Free Software Foundation,
@@ -601,8 +601,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='remind'
 PACKAGE_TARNAME='remind'
-PACKAGE_VERSION='06.00.02'
-PACKAGE_STRING='remind 06.00.02'
+PACKAGE_VERSION='06.01.00'
+PACKAGE_STRING='remind 06.01.00'
 PACKAGE_BUGREPORT=''
 PACKAGE_URL='https://dianne.skoll.ca/projects/remind/'
 
@@ -1258,7 +1258,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-'configure' configures remind 06.00.02 to adapt to many kinds of systems.
+'configure' configures remind 06.01.00 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1320,7 +1320,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of remind 06.00.02:";;
+     short | recursive ) echo "Configuration of remind 06.01.00:";;
    esac
   cat <<\_ACEOF
 
@@ -1408,7 +1408,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-remind configure 06.00.02
+remind configure 06.01.00
 generated by GNU Autoconf 2.72
 
 Copyright (C) 2023 Free Software Foundation, Inc.
@@ -1871,7 +1871,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by remind $as_me 06.00.02, which was
+It was created by remind $as_me 06.01.00, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   $ $0$ac_configure_args_raw
@@ -4848,7 +4848,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by remind $as_me 06.00.02, which was
+This file was extended by remind $as_me 06.01.00, which was
 generated by GNU Autoconf 2.72.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -4913,7 +4913,7 @@ ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-remind config.status 06.00.02
+remind config.status 06.01.00
 configured by $0, generated by GNU Autoconf 2.72,
   with options \\"\$ac_cs_config\\"
 

configure.ac

@@ -1,6 +1,6 @@
 dnl Process this file with autoconf to produce a configure script.
 
-AC_INIT(remind, 06.00.02, , , https://dianne.skoll.ca/projects/remind/)
+AC_INIT(remind, 06.01.00, , , https://dianne.skoll.ca/projects/remind/)
 AC_CONFIG_SRCDIR([src/queue.c])
 
 cat <<'EOF'

contrib/remind-conf-mode/remind-conf-mode.el

@@ -120,7 +120,7 @@
          "PSFILE" "PUSH" "PUSH-FUNCS" "PUSH-VARS" "PUSH-OMIT-CONTEXT" "REM" "RETURN"
          "RUN" "SATISFY" "SCAN" "SCANFROM" "SCHED" "SECOND" "SET"
          "SKIP" "SPECIAL" "SYSINCLUDE" "TAG" "THIRD" "THROUGH" "TODO"
-         "TRANSLATE" "TRANS" "UNSET" "UNTIL" "WARN")
+         "TRANSLATE" "TRANS" "TZ" "UNSET" "UNTIL" "WARN")
    #'(lambda (a b) (> (length a) (length b)))))
 
 
@@ -179,9 +179,9 @@
          "realtoday" "rows" "sgn" "shell" "shellescape" "slide" "soleq"
          "stdout" "strlen" "substr" "sunrise" "sunset" "time" "timepart"
          "timezone" "today" "trig" "trigback" "trigbase" "trigcompletethrough" "trigdate" "trigdatetime"
-         "trigdelta" "trigduration" "trigeventduration" "trigeventstart"
+         "trigdelta" "trigduration" "trigeventduration" "trigeventstart" "trigeventstarttz"
          "trigfrom" "trigger" "triginfo" "trigistodo" "trigmaxoverdue" "trigpriority" "trigrep"
-         "trigscanfrom" "trigtags" "trigtime" "trigtimedelta" "trigtimerep"
+         "trigscanfrom" "trigtags" "trigtime" "trigtimedelta" "trigtimerep" "trigtimetz" "trigtz"
          "triguntil" "trigvalid" "typeof" "tzconvert" "upper" "utctolocal"
          "value" "version" "weekno" "wkday" "wkdaynum" "year"
          )

docs/WHATSNEW

@@ -1,5 +1,16 @@
 CHANGES TO REMIND
 
+* VERSION 6.1 Patch 0 - 2025-??-??
+
+- MAJOR NEW FEATURE: remind: The TZ keyword lets you specify a time
+  zone for a REM command.  All trigger calculations are performed in
+  the named time zone.
+
+- BUG FIX: remind: If Remind was run interactively ("remind -c -" with
+  readline support enabled) it would not properly cache the input
+  file, but would keep asking for interactive input.  This has been
+  fixed.
+
 * VERSION 6.0 Patch 2 - 2025-09-01
 
 - CHANGE: Default $ParseUntriggered to 0 instead of 1.  The default
@@ -11,8 +22,8 @@ CHANGES TO REMIND
 - BUG FIX: remind: Don't add lines to "readline" history unless they
   are actually being read from standard input.
 
-- BUG FIX: remind: On the command-line, make "-i$foo" behave the same
-  way as "-i$foo=0" as was documented in the man page.
+- BUG FIX: remind: On the command-line, make '-i$foo' behave the same
+  way as '-i$foo=0' as was documented in the man page.
 
 - BUG FIX: remind: Clamp the output of trigger() to "1 January 1990 AT
   00:00" if the UTC flag is used, even if it would actually produce a

examples/alignment.rem

@@ -1,3 +1,4 @@
+#!/usr/bin/env -S remind -@2
 # Demo the columns() function
 #
 # Run as:  remind -@2 alignment.rem

examples/tflag.rem

@@ -0,0 +1,19 @@
+#!/usr/bin/env -S remind -@2
+# This is a little Easter Egg that simply draws
+# the Transgender Pride Flag.  It's included in
+# Remind because (1) the author is trans and (2)
+# trans people are under attack in the USA and many
+# other places.  So this is a little show of support
+# and resistance for trans people.
+BANNER %
+SET $AddBlankLines 0
+REM SPECIAL COLOR  91 206 250 ██████████████████████████████████
+REM SPECIAL COLOR  91 206 250 ██████████████████████████████████
+REM SPECIAL COLOR 245 169 184 ██████████████████████████████████
+REM SPECIAL COLOR 245 169 184 ██████████████████████████████████
+REM SPECIAL COLOR 255 255 255 ██████████████████████████████████
+REM SPECIAL COLOR 255 255 255 ██████████████████████████████████
+REM SPECIAL COLOR 245 169 184 ██████████████████████████████████
+REM SPECIAL COLOR 245 169 184 ██████████████████████████████████
+REM SPECIAL COLOR  91 206 250 ██████████████████████████████████
+REM SPECIAL COLOR  91 206 250 ██████████████████████████████████

man/rem2ps.1.in

@@ -547,9 +547,17 @@ will produce the following \fBinfo\fR hash:
 .PP
 .RE
 .TP
+.B tz \fIzone\fR
+If a non-empty TZ clause was present, this key will contain the time zone
+name.
+.TP
 .B time \fIt\fR
 If an AT clause was present, this key will contain the time of the AT clause
-in minutes after midnight.
+in minutes after midnight \fIin the system default time zone\fR.
+.TP
+.B time_in_tz \fIt\fR
+If a TZ clause was present, this key will contain the time of the AT clause
+in minutes after midnight \fIin the time zone specified by TZ\fR.
 .TP
 .B tdelta \fIn\fR
 If a time delta (+n after an AT clause) was present, this key contains the
@@ -570,7 +578,12 @@ discussion of duration vs. event duration.
 .TP
 .B eventstart \fIdt\fR
 If an AT clause was present, this key contains the event start time in
-the format \fIYYYY-MM-DDTHH:MM\fR.
+the format \fIYYYY-MM-DD\fRT\fIHH:MM\fR in the \fIsystem default time zone\fR.
+.TP
+.B eventstart_in_tz \fIdt\fR
+If a TZ clause was present, this key containes the event start time in
+the format \fIYYYY-MM-DD\fRT\fIHH:MM\fR in the \fItime zone specified
+by TZ\fR.
 .TP
 .B back \fIn\fR
 If the reminder contained a "back" clause (\-n or \-\-n), this key

man/remind.1.in

@@ -693,6 +693,7 @@ Its syntax is:
 [\fBSCANFROM\fR \fIscan_date\fR | \fBFROM\fR \fIstart_date\fR]
 [\fBDURATION\fR \fIduration\fR]
 [\fBTAG\fR \fItag\fR]
+[\fBTZ\fR \fItimezone\fR]
 [\fBINFO\fR "\fIinfo_string\fR"]
 \fBMSG\fR | \fBMSF\fR | \fBRUN\fR | \fBCAL\fR | \fBSATISFY\fR |
 \fBSPECIAL\fR \fIspecial\fR | \fBPS\fR | \fBPSFILE\fR
@@ -2206,6 +2207,81 @@ the first day of the month.  The local \fBOMIT\fR keyword causes the
 Finally, the \fBAFTER\fR keyword will keep moving the reminder forward
 until it has passed any holidays specified with global \fBOMIT\fR
 commands.
+.PP
+.SH TIMEZONE SUPPORT
+.PP
+The \fBREM\fR command supports an optional \fBTZ\fR keyword, which should
+be followed by the \fIcase-sensitive\fR time zone name in which the
+command is to be interpreted.  Note that if you use the \fBTZ\fR keyword,
+then you \fImust also\fR use an \fBAT\fR clause.  Here are some examples:
+.PP
+.nf
+    REM Wednesday AT 14:00 TZ America/Toronto MSG 2PM Eastern (%2).
+    REM Wednesday AT 23:59 TZ America/Los_Angeles SATISFY [$Td == 13] MSG Foo %b %2.
+.fi
+.PP
+Within a \fBSATISFY\fR clause and an \fBOMITFUNC\fR function, all
+trigger functions and the trigger date are interpreted \fIin the time
+zone specified in the \fBREM\fI command\fR.  Outside the \fBREM\fR
+command, however, trigger functions are adjusted to the local time
+zone.  If the local time zone is UTC and we feed \fBRemind\fR the
+following file on 2025-09-04 UTC:
+.PP
+.nf
+    SET $AddBlankLines 0
+    BANNER %
+    REM Wednesday AT 14:00 TZ America/Toronto MSG 2PM Eastern (%2).
+    set a $T
+    set b $Tt
+    REM MSG a = [a], b = [b]
+    REM Wednesday AT 23:59 TZ America/Los_Angeles SATISFY [$Td == 13] MSG Foo %b %2.
+    set c $T
+    set d $Tt
+    REM MSG c = [c], d = [d]
+.fi
+.PP
+Then the output is as follows:
+.PP
+.nf
+    a = 2025-09-10, b = 18:00
+    c = 2026-05-14, d = 06:59
+.fi
+.PP
+That is because the trigger date of the first (Wednesday, 2025-09-10
+at 14:00 Eastern time) is 2025-09-10 at 18:00 UTC.  In the second case,
+Wednesday, 13 May 2026 is the SATISFied trigger date, which is
+adjusted to Thursday, 14 May 2026 at 06:59 UTC because of the
+time zone adjustment.
+.PP
+If you use an invalid time zone name after the \fBTZ\fR keyword,
+results are undefined.  Unfortunately, \fBRemind\fR cannot diagnose
+this error becase the C library \fBtzset()\fR function has no
+error return.
+.PP
+In a reminder with the \fBTZ\fR keyword, OMIT dates are evaluated in
+the specified time zone.  Here's an example: Suppose the local time zone
+is America/Toronto and you have this script:
+.PP
+.nf
+    # A Friday
+    OMIT 2025-09-05
+
+    # A Saturday
+    OMIT 2025-09-13
+
+    REM Saturday AT 01:00 TZ Europe/Amsterdam SKIP MSG Early Sat AM
+.fi
+.PP
+On 2025-09-05 in the America/Toronto time zone, the reminder \fIwill\fR
+trigger.  Even though 2025-09-05 has been OMITted, the SKIP keyword
+evaluates the date in the Europe/Amsterdam time zone, and 2025-09-06
+(the trigger date) is \fInot\fR omitted.
+.PP
+Conversely, on 2025-09-12 in the America/Toronto time zone, the
+reminder will \fInot\fR trigger.  Even though 2025-09-12 is not OMITted,
+2025-09-13 is, and that is the trigger date in the Europe/Amsterdam
+time zone.
+.PP
 .SH THE DO, INCLUDE AND SYSINCLUDE COMMANDS
 .PP
 \fBRemind\fR allows you to include other files in your reminder script,
@@ -3273,10 +3349,10 @@ A directory path containing standard reminder scripts.  Currently,
 The value of \fB$SysInclude\fR is "@prefix@/share/remind" on
 this installation.
 .TP
-.B $T (read-only, DATE type)
+.B $T (read-only, DATE or INT type)
 Equivalent to \fBtrigdate()\fR.  (See BUILT-IN FUNCTIONS.)
 .TP
-.B $Tb (read-only, DATE type)
+.B $Tb (read-only, DATE or INT type)
 Equivalent to \fBtrigbase()\fR.
 .TP
 .B $Td (read-only)
@@ -3285,7 +3361,7 @@ Equivalent to \fBday(trigdate())\fR.
 .B $Tm (read-only)
 Equivalent to \fBmonnum(trigdate())\fR.
 .TP
-.B $Tu (read-only, DATE type)
+.B $Tu (read-only, DATE or INT type)
 Equivalent to \fBtriguntil()\fR.
 .TP
 .B $Tw (read-only)
@@ -3294,7 +3370,7 @@ Equivalent to \fBwkdaynum(trigdate())\fR.
 .B $Ty (read-only)
 Equivalent to \fByear(trigdate())\fR.
 .TP
-.B $Tt (read-only, TIME type)
+.B $Tt (read-only, TIME or INT type)
 Equivalent to \fBtrigtime()\fR.
 .TP
 .B $TimeSep (STRING type)
@@ -4703,6 +4779,11 @@ have an \fBAT\fR clause, returns the integer -1 (and differs from
 \fBtrigdatetime()\fR in this respect.)  See "MULTI-DAY EVENTS" for more
 information.
 .TP
+.B trigeventstarttz()
+Similar to \fBtrigeventstart()\fR but returns the DATETIME in the time
+zone specified by a TZ clause, if one was present.  If no TZ clause
+was present, returns the same value as \fBtrigeventstart()\fR.
+.TP
 .B trigeventduration()
 Returns a \fBTIME\fR representing the duration of the most recent
 triggerable \fBREM\fR command that had an \fBAT\fR and a
@@ -4753,6 +4834,11 @@ command.  Returns a positive integer N if the "repeat" is of the form
 Similar to \fBtrigrep()\fR, but returns the repeat used in the \fBAT\fR clause
 of a timed reminder.
 .TP
+.B trigtz()
+If a \fBTZ\fR clause was used in the last \fBREM\fR or \fBIFTRIG\fR
+command, returns the time zone name.  Otherwise returns the empty
+string.
+.TP
 .B trigduration()
 Returns (as a TIME type) the \fBDURATION\fR parameter of a timed
 reminder.  If there is no \fBDURATION\fR parameter, returns the
@@ -4852,11 +4938,16 @@ were no TAGs.  If there are multiple tags, they are each separated by
 a single comma, not a comma and a space.
 .TP
 .B trigtime()
-Returns the time of the last \fBREM\fR command with an \fBAT\fR
-clause.  If the last \fBREM\fR did not have an \fBAT\fR clause,
-returns the integer 0.  If a \fBREM\fR command has an \fBAT\fR clause
-with a \fBDURATION\fR, then you can compute the end time as
-\fBtrigtime() + trigduration()\fR.
+Returns the time of the last \fBREM\fR command with an \fBAT\fR clause
+\fIin the system default time zone\fR.  If the last \fBREM\fR did not
+have an \fBAT\fR clause, returns the integer 0.  If a \fBREM\fR
+command has an \fBAT\fR clause with a \fBDURATION\fR, then you can
+compute the end time as \fBtrigtime() + trigduration()\fR.
+.TP
+.B trigtimetz()
+Similar to \fBtrigtime()\fR but returns the time in the time zone specified
+by a TZ clause, if one was present.  If no TZ clause was present, returns
+the same value as \fBtrigtime()\fR.
 .TP
 .B trigvalid()
 Returns 1 if the value returned by \fBtrigdate()\fR is valid for the most
@@ -4873,11 +4964,13 @@ command can never be triggered:
 Returns "STRING", "INT", "DATE", "TIME" or "DATETIME", depending on the type of \fIarg\fR.
 .TP
 .B tzconvert(q_datetime, s_srczone [,s_dstzone])
-Converts \fBdatetime\fR from the time zone named by \fBsrczone\fR to the
-time zone named by \fBdstzone\fR.  If \fBdstzone\fR is omitted, the
-default system time zone is used.  The return value is a DATETIME.  Time
-zone names are system-dependent; consult your operating system for legal
-values.  Here is an example:
+Converts \fBdatetime\fR from the time zone named by \fBsrczone\fR to
+the time zone named by \fBdstzone\fR.  If \fBsrczone\fR is the empty
+string, then the default system time zone is used as the source zone.
+If \fBdstzone\fR is omitted or is the empty string, the default system
+time zone is used as the destination zone.  The return value is a
+DATETIME.  Time zone names are system-dependent; consult your
+operating system for legal values.  Here is an example:
 .PP
 .nf
     tzconvert('2007-07-08@01:14', "Canada/Eastern", "Canada/Pacific")

src/Makefile.in

@@ -40,9 +40,14 @@ REMINDOBJS= $(REMINDSRCS:.c=.o) $(XLATSRC:.c=.o)
 
 all: remind rem2ps
 
-test: all
+test-basic: all
 	@sh ../tests/test-rem
 
+test-tz: all
+	@sh ../tests/test-timezone-support
+
+test: test-basic test-tz
+
 .c.o:
 	@CC@ -c @CPPFLAGS@ @CFLAGS@ @DEFS@ $(CEXTRA) -DSYSDIR=$(datarootdir)/remind -I. -I$(srcdir) $<
 
@@ -117,6 +122,8 @@ beta-tgz:
 	gzip -f -v -9 remind-$(VERSION)-BETA-$(BETA).tar
 	gpg --detach-sign -u dianne@skoll.ca remind-$(VERSION)-BETA-$(BETA).tar.gz
 
+distro-beta: beta-tgz
+
 #---------------- Stuff after this added by "make depend" -----------------
 
 

src/calendar.c

@@ -848,6 +848,9 @@ void ProduceCalendar(void)
     if (CalMonths) {
         FromDSE(DSEToday, &y, &m, &d);
         DSEToday = DSE(y, m, 1);
+        LocalDSEToday = DSEToday;
+        LocalSysTime = 0;
+        SysTime = 0;
         GenerateCalEntries(-1);
         DidAMonth = 0;
         if (PsCal == PSCAL_LEVEL3) {
@@ -862,8 +865,13 @@ void ProduceCalendar(void)
         }
         return;
     } else {
-        if (MondayFirst) DSEToday -= (DSEToday%7);
-        else             DSEToday -= ((DSEToday+1)%7);
+        if (MondayFirst) {
+            DSEToday -= (DSEToday%7);
+            LocalDSEToday -= (LocalDSEToday%7);
+        } else {
+            DSEToday -= ((DSEToday+1)%7);
+            LocalDSEToday -= ((LocalDSEToday+1)%7);
+        }
 
         GenerateCalEntries(-1);
 
@@ -912,7 +920,7 @@ static void DoCalendarOneWeek(int nleft)
     int y, m, d, done, i, l, wd;
     char buf[128];
     int LinesWritten = 0;
-    int OrigDse = DSEToday;
+    int OrigDse = LocalDSEToday;
 
     InitMoonsAndShades();
 /* Fill in the column entries */
@@ -920,6 +928,7 @@ static void DoCalendarOneWeek(int nleft)
         ColToDay[i] = DayOf(DSEToday);
         GenerateCalEntries(i);
         DSEToday++;
+        LocalDSEToday++;
     }
 
     /* Figure out weekday of first column */
@@ -1205,6 +1214,7 @@ static int WriteCalendarRow(void)
         GenerateCalEntries(i);
         ColToDay[i] = DayOf(DSEToday);
         DSEToday++;
+        LocalDSEToday++;
     }
 
 /* Output the entries */
@@ -1932,6 +1942,17 @@ static int DoCalRem(ParsePtr p, int col)
         return r;
     }
 
+    if (trig.tz != NULL && tim.ttime == NO_TIME) {
+        FreeTrig(&trig);
+        return E_TZ_NO_AT;
+    }
+
+    /* An empty string for time zone is just a missing time zone */
+    if (trig.tz != NULL && !*trig.tz) {
+        free( (void *) trig.tz);
+        trig.tz = NULL;
+    }
+
     if (trig.typ == MSG_TYPE ||
         trig.typ == CAL_TYPE ||
         trig.typ == MSF_TYPE) {
@@ -1951,7 +1972,9 @@ static int DoCalRem(ParsePtr p, int col)
         return E_EOLN;
     }
     if (trig.typ == SAT_TYPE) {
+        EnterTimezone(trig.tz);
         r=DoSatRemind(&trig, &tim, p);
+        ExitTimezone(trig.tz);
         if (r) {
             if (r == E_CANT_TRIG && trig.maybe_uncomputable) {
                 r = OK;
@@ -2019,7 +2042,9 @@ static int DoCalRem(ParsePtr p, int col)
         }
     } else {
         /* Calculate the trigger date */
+        EnterTimezone(trig.tz);
         dse = ComputeTrigger(get_scanfrom(&trig), &trig, &tim, &r, 1);
+        ExitTimezone(trig.tz);
         if (r) {
             if (r == E_CANT_TRIG && trig.maybe_uncomputable) {
                 r = OK;
@@ -2029,6 +2054,9 @@ static int DoCalRem(ParsePtr p, int col)
         }
     }
 
+    /* Adjust trigger date/time to time zone */
+    dse = AdjustTriggerForTimeZone(&trig, dse, &tim);
+
     /* Add to global OMITs if so indicated */
     if (trig.addomit) {
         r = AddGlobalOmit(dse);
@@ -2299,6 +2327,9 @@ static int DoCalRem(ParsePtr p, int col)
         e->nonconst_expr = nonconst_expr;
         e->if_depth = get_if_pointer() - get_base_if_pointer();
         e->trig = trig;
+        if (e->trig.tz) {
+            e->trig.tz = StrDup(e->trig.tz);
+        }
         e->tt = tim;
 #ifdef REM_USE_WCHAR
         e->wc_pos = NULL;
@@ -2395,6 +2426,9 @@ static void WriteSimpleEntryProtocol1(CalEntry const *e)
 void WriteJSONTimeTrigger(TimeTrig const *tt)
 {
     PrintJSONKeyPairTime("time", tt->ttime);
+    if (tt->ttime != tt->ttime_orig) {
+        PrintJSONKeyPairTime("time_in_tz", tt->ttime_orig);
+    }
     PrintJSONKeyPairTime("nexttime", tt->nexttime);
     PrintJSONKeyPairInt("tdelta", tt->delta);
     PrintJSONKeyPairInt("trep", tt->rep);
@@ -2526,6 +2560,10 @@ void WriteJSONTrigger(Trigger const *t, int include_tags)
     PrintJSONKeyPairDate("from", t->from);
     PrintJSONKeyPairInt("priority", t->priority);
     PrintJSONKeyPairDateTime("eventstart", t->eventstart);
+    if (t->eventstart_orig != NO_TIME &&
+        t->eventstart_orig != t->eventstart) {
+        PrintJSONKeyPairDateTime("eventstart_in_tz", t->eventstart_orig);
+    }
     if (t->eventduration != NO_TIME) {
         PrintJSONKeyPairInt("eventduration", t->eventduration);
     }
@@ -2547,6 +2585,7 @@ void WriteJSONTrigger(Trigger const *t, int include_tags)
         }
         PrintJSONKeyPairString("tags", DBufValue(&(t->tags)));
     }
+    PrintJSONKeyPairString("tz", t->tz);
 }
 
 static void WriteSimpleEntryProtocol2(CalEntry *e)
@@ -2569,6 +2608,9 @@ static void WriteSimpleEntryProtocol2(CalEntry *e)
     }
     if (e->time != NO_TIME) {
         PrintJSONKeyPairInt("time", e->time);
+        if (e->tt.ttime_orig != e->tt.ttime) {
+            PrintJSONKeyPairInt("time_in_tz", e->tt.ttime_orig);
+        }
         if (e->tt.delta) {
             PrintJSONKeyPairInt("tdelta", e->tt.delta);
         }

src/dorem.c

@@ -18,6 +18,7 @@
 #include <string.h>
 
 #include <stdlib.h>
+#include <time.h>
 
 #include "types.h"
 #include "globals.h"
@@ -32,6 +33,126 @@ static int ParseUntil (ParsePtr s, Trigger *t, int type);
 static int ShouldTriggerBasedOnWarn (Trigger const *t, int dse, int *err);
 static int ComputeTrigDuration(TimeTrig const *t);
 
+static int CalledEnterTimezone = 0;
+
+int AdjustTriggerForTimeZone(Trigger *trig, int dse, TimeTrig *tim)
+{
+    int y, m, d, hour, minute;
+    int r;
+    struct tm tm;
+    if (!trig->tz || dse < 0) {
+        /* Already local time or did not compute trigger date - no adjustments needed */
+        return dse;
+    }
+    FromDSE(dse, &y, &m, &d);
+    hour = tim->ttime_orig / 60;
+    minute = tim->ttime_orig % 60;
+
+    r = tz_convert(y, m, d, hour, minute, trig->tz, LocalTimeZone, &tm);
+    if (r != 1) {
+        Wprint(tr("Error adjusting trigger to local time zone"));
+        return dse;
+    }
+
+    dse = DSE(tm.tm_year+1900, tm.tm_mon, tm.tm_mday);
+    tim->ttime = tm.tm_hour * 60 + tm.tm_min;
+    /* Adjust eventstart also */
+    trig->eventstart = dse * MINUTES_PER_DAY + tim->ttime;
+    SaveAllTriggerInfo(trig, tim, dse, tim->ttime, 1);
+    if (DebugFlag & DB_PRTTRIG) {
+        fprintf(ErrFp, "%s(%s): Trig(tz_adj %s) = %s, %d %s, %d AT %02d:%02d",
+                GetCurrentFilename(), line_range(LineNoStart, LineNo), trig->tz,
+                get_day_name(dse % 7), tm.tm_mday, get_month_name(tm.tm_mon),
+                1900 + tm.tm_year, tim->ttime / 60, tim->ttime % 60);
+        if (tim->duration != NO_TIME) {
+            fprintf(ErrFp, " DURATION %02d:%02d",
+                    (tim->duration / 60),
+                    (tim->duration % 60));
+        }
+        fprintf(ErrFp, "\n");
+    }
+    return dse;
+}
+
+void ExitTimezone(char const *tz)
+{
+    if (!CalledEnterTimezone) {
+        fprintf(stderr, "ExitTimezone called without EnterTimezone!!!\n");
+        abort();
+    }
+    CalledEnterTimezone = 0;
+    if (!tz || !*tz) {
+        /* Nothing to do */
+        return;
+    }
+    /* Revert to our local time zone */
+    (void) tz_set_tz(LocalTimeZone);
+
+    DSEToday = LocalDSEToday;
+    SysTime = LocalSysTime;
+    FromDSE(DSEToday, &CurYear, &CurMon, &CurDay);
+
+    if (DebugFlag & DB_SWITCH_ZONE) {
+        fprintf(stderr, "TZ exit %s: %04d-%02d-%02d %02d:%02d\n", tz,
+                CurYear, CurMon+1, CurDay, SysTime / 3600, (SysTime/60) % 60);
+    }
+    return;
+}
+
+
+void EnterTimezone(char const *tz)
+{
+    struct tm tm;
+    int y, m, d;
+    time_t t;
+
+    if (CalledEnterTimezone) {
+        fprintf(stderr, "EnterTimezone called twice in a row!!!\n");
+        abort();
+    }
+
+    CalledEnterTimezone = 1;
+
+    if (!tz || !*tz) {
+        /* Stay in local timezone */
+        return;
+    }
+
+    FromDSE(LocalDSEToday, &y, &m, &d);
+    tm.tm_sec   = 0;
+    tm.tm_min   = (LocalSysTime/60) % 60;
+    tm.tm_hour  = LocalSysTime / 3600;
+    tm.tm_mday  = d;
+    tm.tm_mon   = m;
+    tm.tm_year  = y - 1900;
+    tm.tm_wday  = 0;  /* Ignored by mktime */
+    tm.tm_yday  = 0;  /* Ignored by mktime */
+    tm.tm_isdst = -1; /* Information not available */
+
+    t = mktime(&tm);    /* Convert local time to seconds */
+
+    /* Set target timezone */
+    (void) tz_set_tz(tz);
+
+    /* Update our variables */
+    (void) localtime_r(&t, &tm);
+
+    SysTime  = tm.tm_min * 60 + (tm.tm_hour * 3600);
+    CurDay   = tm.tm_mday;
+    CurMon   = tm.tm_mon;
+    CurYear  = tm.tm_year + 1900;
+    /* Adjust DSEToday back by a day if midnight in our time zone requires it */
+    if (SysTime < LocalSysTime) {
+        DSEToday--;
+        FromDSE(DSEToday, &CurYear, &CurMon, &CurDay);
+    }
+
+    if (DebugFlag & DB_SWITCH_ZONE) {
+        fprintf(stderr, "TZ enter %s: %04d-%02d-%02d %02d:%02d\n", tz,
+                CurYear, CurMon+1, CurDay, SysTime / 3600, (SysTime/60) % 60);
+    }
+}
+
 void remove_trailing_newlines(DynamicBuffer *buf)
 {
     char *s = (char *) DBufValue(buf) + DBufLen(buf) - 1;
@@ -287,6 +408,18 @@ int DoRem(ParsePtr p)
         return r;
     }
 
+    if (trig.tz != NULL && tim.ttime == NO_TIME) {
+        PurgeEchoLine("%s\n", CurLine);
+        FreeTrig(&trig);
+        return E_TZ_NO_AT;
+    }
+
+    /* An empty string for time zone is just a missing time zone */
+    if (trig.tz != NULL && !*trig.tz) {
+        free( (void *) trig.tz);
+        trig.tz = NULL;
+    }
+
     if (trig.complete_through != NO_DATE && !trig.is_todo) {
         PurgeEchoLine("%s\n", CurLine);
         FreeTrig(&trig);
@@ -312,7 +445,9 @@ int DoRem(ParsePtr p)
             PurgeEchoLine("%s\n", "#!P: Cannot purge SATISFY-type reminders");
         }
         PurgeEchoLine("%s\n", CurLine);
+        EnterTimezone(trig.tz);
         r=DoSatRemind(&trig, &tim, p);
+        ExitTimezone(trig.tz);
         if (r) {
             if (r == E_CANT_TRIG && trig.maybe_uncomputable) {
                 r = OK;
@@ -372,7 +507,9 @@ int DoRem(ParsePtr p)
         }
     } else {
         /* Calculate the trigger date */
+        EnterTimezone(trig.tz);
         dse = ComputeTrigger(get_scanfrom(&trig), &trig, &tim, &r, 1);
+        ExitTimezone(trig.tz);
         if (r) {
             if (PurgeMode) {
                 if (!Hush) {
@@ -388,6 +525,9 @@ int DoRem(ParsePtr p)
         }
     }
 
+    /* Adjust trigger date/time to time zone */
+    dse = AdjustTriggerForTimeZone(&trig, dse, &tim);
+
     /* Add to global OMITs if so indicated */
     if (trig.addomit) {
         r = AddGlobalOmit(dse);
@@ -437,6 +577,7 @@ int DoRem(ParsePtr p)
     }
 
     r = OK;
+
     if (ShouldTriggerReminder(&trig, &tim, dse, &err)) {
         /* Filter unwanted events/todos */
         if (todo_filtered(&trig)) {
@@ -479,6 +620,9 @@ int DoRem(ParsePtr p)
             }
             if (tim.ttime != NO_TIME) {
                 PrintJSONKeyPairInt("time", tim.ttime);
+                if (tim.ttime_orig != tim.ttime) {
+                    PrintJSONKeyPairInt("time_in_tz", tim.ttime_orig);
+                }
             }
             if (p->nonconst_expr) {
                 PrintJSONKeyPairInt("nonconst_expr", 1);
@@ -664,11 +808,13 @@ int ParseRem(ParsePtr s, Trigger *trig, TimeTrig *tim)
     trig->omitfunc[0] = 0;
     trig->duration_days = 0;
     trig->eventstart = NO_TIME;
+    trig->eventstart_orig = NO_TIME;
     trig->eventduration = NO_TIME;
     trig->maybe_uncomputable = 0;
     DBufInit(&(trig->tags));
     trig->passthru[0] = 0;
     tim->ttime = NO_TIME;
+    tim->ttime_orig = NO_TIME;
     tim->delta = DefaultTDelta;
     tim->rep   = NO_REP;
     tim->duration = NO_TIME;
@@ -678,6 +824,7 @@ int ParseRem(ParsePtr s, Trigger *trig, TimeTrig *tim)
     trig->complete_through = NO_DATE;
     trig->adj_for_last = 0;
     trig->infos = NULL;
+    trig->tz = NULL;
 
     int parsing = 1;
     while(parsing) {
@@ -740,6 +887,7 @@ int ParseRem(ParsePtr s, Trigger *trig, TimeTrig *tim)
             trig->m = m;
             trig->d = d;
             tim->ttime = (tok.val % MINUTES_PER_DAY);
+            tim->ttime_orig = tim->ttime;
             break;
 
         case T_WkDay:
@@ -795,6 +943,7 @@ int ParseRem(ParsePtr s, Trigger *trig, TimeTrig *tim)
             DBufFree(&buf);
             if (tim->ttime != NO_TIME) return E_TIME_TWICE;
             tim->ttime = tok.val;
+            tim->ttime_orig = tok.val;
             r = ParseTimeTrig(s, tim);
             if (r) return r;
             trig->duration_days = ComputeTrigDuration(tim);
@@ -951,6 +1100,22 @@ int ParseRem(ParsePtr s, Trigger *trig, TimeTrig *tim)
             DBufFree(&buf);
             break;
 
+        case T_Tz:
+            if (trig->tz) {
+                return E_TZ_SPECIFIED_TWICE;
+            }
+
+            r = ParseTokenOrQuotedString(s, &buf);
+            if (r != OK) {
+                return r;
+            }
+            trig->tz = StrDup(DBufValue(&buf));
+            if (!trig->tz) {
+                return E_NO_MEM;
+            }
+            DBufFree(&buf);
+            break;
+
         case T_Info:
             r = ParseQuotedString(s, &buf);
             if (r != OK) {
@@ -1097,6 +1262,7 @@ static int ParseTimeTrig(ParsePtr s, TimeTrig *tim)
             DBufFree(&buf);
             if (tim->ttime != NO_TIME) return E_TIME_TWICE;
             tim->ttime = tok.val;
+            tim->ttime_orig = tok.val;
             break;
 
         case T_Delta:
@@ -1817,6 +1983,7 @@ int DoSatRemind(Trigger *trig, TimeTrig *tt, ParsePtr p)
         } else if (dse == start) {
             if (tt->ttime != NO_TIME) {
                 trig->eventstart = MINUTES_PER_DAY * r + tt->ttime;
+                trig->eventstart_orig = trig->eventstart;
                 if (tt->duration != NO_TIME) {
                     trig->eventduration = tt->duration;
                 }

src/err.h

@@ -132,6 +132,8 @@
 #define E_COMPLETE_WITHOUT_TODO 108
 #define E_MAX_OVERDUE_TWICE 109
 #define E_MAX_OVERDUE_WITHOUT_TODO 110
+#define E_TZ_SPECIFIED_TWICE 111
+#define E_TZ_NO_AT          112
 
 #ifdef MK_GLOBALS
 #undef EXTERN
@@ -261,6 +263,8 @@ EXTERN char *ErrMsg[]
 /* E_COMPLETE_WITHOUT_TODO */ "COMPLETE-THROUGH specified without TODO",
 /* E_MAX_OVERDUE_TWICE */ "MAX-OVERDUE specified twice",
 /* E_MAX_OVERDUE_WITHOUT_TODO */ "MAX-OVERDUE specified without TODO",
+/* E_TZ_SPECIFIED_TWICE */ "TZ specified twice",
+/* E_TZ_NO_AT */           "TZ specified for non-timed reminder",
 }
 #endif /* MK_GLOBALS */
 ;

src/files.c

@@ -304,6 +304,10 @@ static int ReadLineFromFile(int use_pclose)
     DBufFree(&LineBuffer);
 
     LineNoStart = LineNo+1;
+
+    if (!fp) {
+        return E_EOF;
+    }
     while(fp) {
 #ifdef USE_READLINE
         if (IS_INTERACTIVE()) {
@@ -454,6 +458,7 @@ static int OpenFile(char const *fname)
                 fprintf(ErrFp, tr("Reading `%s': Found in cache"), fname);
                 fprintf(ErrFp, "\n");
             }
+            fp = NULL;
             CLine = h->cache;
             SetCurrentFilename(fname);
             LineNo = 0;
@@ -671,6 +676,7 @@ static int PopFile(void)
     IncludeStruct *i;
 
     pop_excess_ifs(FileName);
+    fp = NULL;
 
     if (!IStackPtr) return E_EOF;
     i = &IStack[IStackPtr-1];
@@ -683,17 +689,16 @@ static int PopFile(void)
         RunDisabled = oldRunDisabled;
     }
 
-    if (IStackPtr <= 1) {
+    if (TopLevel()) {
+        IStackPtr = 0;
         return E_EOF;
     }
-
     IStackPtr--;
 
     LineNo = i->LineNo;
     LineNoStart = i->LineNoStart;
     set_base_if_pointer(i->base_if_pointer);
     CLine = i->CLine;
-    fp = NULL;
     SetCurrentFilename(i->filename);
     if (!i->ownedByMe) {
         RunDisabled |= RUN_NOTOWNER;

src/funcs.c

@@ -181,6 +181,7 @@ static int FTrigduration   (func_info *);
 static int FTriginfo       (func_info *);
 static int FTrigeventduration(func_info *);
 static int FTrigeventstart (func_info *);
+static int FTrigeventstarttz (func_info *);
 static int FTrigfrom       (func_info *);
 static int FTrigger        (func_info *);
 static int FTrigistodo     (func_info *);
@@ -190,8 +191,10 @@ static int FTrigrep        (func_info *);
 static int FTrigscanfrom   (func_info *);
 static int FTrigtags       (func_info *);
 static int FTrigtime       (func_info *);
+static int FTrigtimetz     (func_info *);
 static int FTrigtimedelta  (func_info *);
 static int FTrigtimerep    (func_info *);
+static int FTrigtz         (func_info *);
 static int FTriguntil      (func_info *);
 static int FTrigvalid      (func_info *);
 static int FTypeof         (func_info *);
@@ -206,7 +209,6 @@ static int FWkdaynum       (func_info *);
 static int FYear           (func_info *);
 
 static int SunStuff        (int rise, double cosz, int dse);
-static int tz_set_tz       (char const *tz);
 
 /* Caches for extracting months, days, years from dates - may
    improve performance slightly. */
@@ -357,6 +359,7 @@ BuiltinFunc Func[] = {
     {   "trigduration", 0,      0,      0,          FTrigduration, NULL },
     {   "trigeventduration", 0, 0,      0,          FTrigeventduration, NULL },
     {   "trigeventstart", 0,    0,      0,          FTrigeventstart, NULL },
+    {   "trigeventstarttz", 0,  0,      0,          FTrigeventstarttz, NULL },
     {   "trigfrom",     0,      0,      0,          FTrigfrom, NULL },
     {   "trigger",      1,      3,      0,          FTrigger, NULL },
     {   "triginfo",     1,      1,      0,          FTriginfo, NULL },
@@ -369,6 +372,8 @@ BuiltinFunc Func[] = {
     {   "trigtime",     0,      0,      0,          FTrigtime, NULL },
     {   "trigtimedelta",0,      0,      0,          FTrigtimedelta, NULL },
     {   "trigtimerep",  0,      0,      0,          FTrigtimerep, NULL },
+    {   "trigtimetz",   0,      0,      0,          FTrigtimetz, NULL },
+    {   "trigtz",       0,      0,      0,          FTrigtz, NULL },
     {   "triguntil",    0,      0,      0,          FTriguntil, NULL },
     {   "trigvalid",    0,      0,      0,          FTrigvalid, NULL },
     {   "typeof",       1,      1,      1,          FTypeof, NULL },
@@ -1956,6 +1961,14 @@ static int FTrigtimerep(func_info *info)
     return OK;
 }
 
+static int FTrigtz(func_info *info)
+{
+    if (!LastTrigger.tz) {
+        return RetStrVal("", info);
+    }
+    return RetStrVal(LastTrigger.tz, info);
+}
+
 static int FTrigeventduration(func_info *info)
 {
     if (LastTrigger.eventduration == NO_TIME) {
@@ -1991,6 +2004,22 @@ static int FTrigeventstart(func_info *info)
     return OK;
 }
 
+static int FTrigeventstarttz(func_info *info)
+{
+    if (LastTrigger.eventstart == NO_TIME) {
+        RetVal.type = INT_TYPE;
+        RETVAL = -1;
+    } else {
+        RetVal.type = DATETIME_TYPE;
+        if (LastTrigger.eventstart_orig != NO_TIME) {
+            RETVAL = LastTrigger.eventstart_orig;
+        } else {
+            RETVAL = LastTrigger.eventstart;
+        }
+    }
+    return OK;
+}
+
 static int FTrigduration(func_info *info)
 {
     if (LastTimeTrig.duration == NO_TIME) {
@@ -2077,6 +2106,22 @@ static int FTrigtime(func_info *info)
     return OK;
 }
 
+static int FTrigtimetz(func_info *info)
+{
+    if (LastTriggerTime != NO_TIME) {
+        RetVal.type = TIME_TYPE;
+        if (LastTimeTrig.ttime_orig != NO_TIME) {
+            RETVAL = LastTimeTrig.ttime_orig;
+        } else {
+            RETVAL = LastTriggerTime;
+        }
+    } else {
+        RetVal.type = INT_TYPE;
+        RETVAL = 0;
+    }
+    return OK;
+}
+
 static int FTrigdatetime(func_info *info)
 {
     if (!LastTrigValid) {
@@ -3879,7 +3924,7 @@ static void unsetenv(char const *varname)
 /*  Conversion between different timezones.                    */
 /*                                                             */
 /***************************************************************/
-static int tz_set_tz(char const *tz)
+int tz_set_tz(char const *tz)
 {
     int r;
     if (tz == NULL) {
@@ -3892,7 +3937,7 @@ static int tz_set_tz(char const *tz)
     return r;
 }
 
-static int tz_convert(int year, int month, int day,
+int tz_convert(int year, int month, int day,
                       int hour, int minute,
                       char const *src_tz, char const *tgt_tz,
                       struct tm *tm)
@@ -3919,9 +3964,12 @@ static int tz_convert(int year, int month, int day,
         old_tz = StrDup(old_tz);
         if (!old_tz) return E_NO_MEM;
     }
-    if (tgt_tz == NULL) {
+    if (tgt_tz == NULL || !*tgt_tz) {
         tgt_tz = old_tz;
     }
+    if (src_tz == NULL || !*src_tz) {
+        src_tz = old_tz;
+    }
 
     /* set source TZ */
     r = tz_set_tz(src_tz);
@@ -4217,25 +4265,32 @@ FEvalTrig(func_info *info)
         DestroyParser(&p);
         return r;
     }
+    if (trig.tz != NULL && tim.ttime == NO_TIME) {
+        FreeTrig(&trig);
+        return E_TZ_NO_AT;
+    }
     if (trig.typ != NO_TYPE) {
         DestroyParser(&p);
         FreeTrig(&trig);
         return E_PARSE_ERR;
     }
     if (scanfrom == NO_DATE) {
+        EnterTimezone(trig.tz);
         dse = ComputeTrigger(get_scanfrom(&trig), &trig, &tim, &r, 0);
+        ExitTimezone(trig.tz);
     } else {
         /* Hokey... */
         if (get_scanfrom(&trig) != DSEToday) {
             Wprint(tr("Warning: SCANFROM is ignored in two-argument form of evaltrig()"));
         }
+        EnterTimezone(trig.tz);
         dse = ComputeTrigger(scanfrom, &trig, &tim, &r, 0);
+        ExitTimezone(trig.tz);
     }
     if (r == E_CANT_TRIG && trig.maybe_uncomputable) {
         r = 0;
         dse = -1;
     }
-    FreeTrig(&trig);
     DestroyParser(&p);
     if (r) return r;
     if (dse < 0) {
@@ -4245,9 +4300,11 @@ FEvalTrig(func_info *info)
         RetVal.type = DATE_TYPE;
         RETVAL = dse;
     } else {
+        dse = AdjustTriggerForTimeZone(&trig, dse, &tim);
         RetVal.type = DATETIME_TYPE;
         RETVAL = (MINUTES_PER_DAY * dse) + tim.ttime;
     }
+    FreeTrig(&trig);
     return OK;
 }
 
@@ -4276,6 +4333,10 @@ FMultiTrig(func_info *info)
             DestroyParser(&p);
             return r;
         }
+        if (trig.tz != NULL && tim.ttime == NO_TIME) {
+            FreeTrig(&trig);
+            return E_TZ_NO_AT;
+        }
         if (trig.typ != NO_TYPE) {
             DestroyParser(&p);
             FreeTrig(&trig);
@@ -4286,6 +4347,9 @@ FMultiTrig(func_info *info)
             return E_PARSE_ERR;
         }
         dse = ComputeTrigger(get_scanfrom(&trig), &trig, &tim, &r, 0);
+
+        /* multitrig only does untimed reminders, so no need to worry
+           about time zones */
         DestroyParser(&p);
 
         if (r != E_CANT_TRIG) {
@@ -4333,18 +4397,25 @@ FTrig(func_info *info)
             DestroyParser(&p);
             return r;
         }
+        if (trig.tz != NULL && tim.ttime == NO_TIME) {
+            FreeTrig(&trig);
+            return E_TZ_NO_AT;
+        }
         if (trig.typ != NO_TYPE) {
             DestroyParser(&p);
             FreeTrig(&trig);
             return E_PARSE_ERR;
         }
+        EnterTimezone(trig.tz);
         dse = ComputeTrigger(get_scanfrom(&trig), &trig, &tim, &r, 0);
+        ExitTimezone(trig.tz);
         DestroyParser(&p);
 
         if (r == E_CANT_TRIG) {
             FreeTrig(&trig);
             continue;
         }
+        dse = AdjustTriggerForTimeZone(&trig, dse, &tim);
         if (ShouldTriggerReminder(&trig, &tim, dse, &r)) {
             LastTrig = dse;
             RETVAL = dse;

src/globals.h

@@ -47,6 +47,7 @@ EXTERN  FILE *ErrFp;
 
 EXTERN  int     DSEToday;
 EXTERN  int     RealToday;
+EXTERN  int     LocalDSEToday;
 EXTERN  int     CurDay;
 EXTERN  int     CurMon;
 EXTERN  int     CurYear;
@@ -98,9 +99,11 @@ EXTERN  INIT(   int     SortByPrio, SORT_NONE);
 EXTERN  INIT(   int     UntimedBeforeTimed, 0);
 EXTERN  INIT(   int     DefaultPrio, NO_PRIORITY);
 EXTERN  INIT(   int     SysTime, -1);
+EXTERN  INIT(   int     LocalSysTime, -1);
 EXTERN  INIT(   int     ParseUntriggered, 0);
 
 EXTERN  char    const *InitialFile;
+EXTERN  char    const *LocalTimeZone;
 EXTERN  int     FileAccessDate;
 
 EXTERN  INIT(   int     WeekdayOmits, 0);

src/init.c

@@ -177,8 +177,25 @@ void InitRemind(int argc, char const *argv[])
     int dse;
     int ttyfd;
 
+    /* Make sure remind is not installed set-uid or set-gid */
+    if (getgid() != getegid() ||
+        getuid() != geteuid()) {
+        fprintf(ErrFp, "\nRemind should not be installed set-uid or set-gid.\nCHECK YOUR SYSTEM SECURITY.\n");
+        exit(EXIT_FAILURE);
+    }
+
     dse = NO_DATE;
 
+    /* Initialize local time zone */
+    LocalTimeZone = getenv("TZ");
+    if (LocalTimeZone) {
+        LocalTimeZone = StrDup(LocalTimeZone);
+        if (!LocalTimeZone) {
+            fprintf(stderr, "Out of memory!\n");
+            exit(1);
+        }
+    }
+
     /* Initialize variable hash table */
     InitVars();
 
@@ -203,13 +220,6 @@ void InitRemind(int argc, char const *argv[])
 
     InitDedupeTable();
 
-    /* Make sure remind is not installed set-uid or set-gid */
-    if (getgid() != getegid() ||
-        getuid() != geteuid()) {
-        fprintf(ErrFp, "\nRemind should not be installed set-uid or set-gid.\nCHECK YOUR SYSTEM SECURITY.\n");
-        exit(EXIT_FAILURE);
-    }
-
     y = NO_YR;
     m = NO_MON;
     d = NO_DAY;
@@ -221,7 +231,9 @@ void InitRemind(int argc, char const *argv[])
         fprintf(ErrFp, "\n");
         exit(EXIT_FAILURE);
     }
+    LocalSysTime = SystemTime(0);
     DSEToday = RealToday;
+    LocalDSEToday = DSEToday;
     FromDSE(DSEToday, &CurYear, &CurMon, &CurDay);
 
     /* Initialize Latitude and Longitude */
@@ -646,6 +658,7 @@ void InitRemind(int argc, char const *argv[])
                     case 'q': case 'Q': DebugFlag |= DB_TRANSLATE;   break;
                     case 'n': case 'N': DebugFlag |= DB_NONCONST;    break;
                     case 'u': case 'U': DebugFlag |= DB_UNUSED_VARS; break;
+                    case 'z': case 'Z': DebugFlag |= DB_SWITCH_ZONE; break;
                     default:
                         fprintf(ErrFp, GetErr(M_BAD_DB_FLAG), *(arg-1));
                         fprintf(ErrFp, "\n");
@@ -711,6 +724,7 @@ void InitRemind(int argc, char const *argv[])
                 if (SysTime != -1L) Usage();
                 else {
                     SysTime = (long) tok.val * 60L;
+                    LocalSysTime = SysTime;
                     DontQueue = 1;
                     Daemon = 0;
                 }
@@ -720,6 +734,7 @@ void InitRemind(int argc, char const *argv[])
                 if (SysTime != -1L) Usage();
                 if (m != NO_MON || d != NO_DAY || y != NO_YR || dse != NO_DATE) Usage();
                 SysTime = (tok.val % MINUTES_PER_DAY) * 60;
+                LocalSysTime = SysTime;
                 DontQueue = 1;
                 Daemon = 0;
                 dse = tok.val / MINUTES_PER_DAY;
@@ -790,6 +805,7 @@ void InitRemind(int argc, char const *argv[])
                 fprintf(ErrFp, "%s", BadDate);
                 Usage();
             }
+            LocalDSEToday = DSEToday;
             CurYear = y;
             CurMon = m;
             CurDay = d;
@@ -1144,6 +1160,7 @@ ProcessLongOption(char const *arg)
         /* Update RealToday because of TestMode */
         RealToday = SystemDate(&CurYear, &CurMon, &CurDay);
         DSEToday = RealToday;
+        LocalDSEToday = DSEToday;
         FromDSE(DSEToday, &CurYear, &CurMon, &CurDay);
 
         return;

src/main.c

@@ -153,6 +153,7 @@ int main(int argc, char *argv[])
 
     DBufInit(&(LastTrigger.tags));
     LastTrigger.infos = NULL;
+    LastTrigger.tz = NULL;
     ClearLastTriggers();
 
     atexit(exitfunc);
@@ -1290,7 +1291,9 @@ int DoIfTrig(ParsePtr p)
     } else {
         if ( (r=ParseRem(p, &trig, &tim)) ) return r;
         if (trig.typ != NO_TYPE) return E_PARSE_ERR;
+        EnterTimezone(trig.tz);
         dse = ComputeTrigger(get_scanfrom(&trig), &trig, &tim, &r, 1);
+        ExitTimezone(trig.tz);
         if (r) {
             if (r != E_CANT_TRIG || !trig.maybe_uncomputable) {
                 if (!Hush || r != E_RUN_DISABLED) {
@@ -1299,6 +1302,9 @@ int DoIfTrig(ParsePtr p)
             }
             push_if(0, 0);
         } else {
+            if (dse >= 0) {
+                dse = AdjustTriggerForTimeZone(&trig, dse, &tim);
+            }
             if (ShouldTriggerReminder(&trig, &tim, dse, &err)) {
                 push_if(1, 0);
             } else {
@@ -1439,6 +1445,11 @@ static int DoDebug(ParsePtr p)
             if (val) DebugFlag |= DB_UNUSED_VARS;
             else     DebugFlag &= ~DB_UNUSED_VARS;
             break;
+        case 'z':
+        case 'Z':
+            if (val) DebugFlag |= DB_SWITCH_ZONE;
+            else     DebugFlag &= ~DB_SWITCH_ZONE;
+            break;
         default:
             Wprint(GetErr(M_BAD_DB_FLAG), ch);
             break;
@@ -2039,6 +2050,10 @@ FreeTrig(Trigger *t)
     if (t->infos) {
         FreeTrigInfoChain(t->infos);
     }
+    if (t->tz) {
+        free( (void *) t->tz);
+    }
+    t->tz = NULL;
     t->infos = NULL;
 }
 
@@ -2069,7 +2084,9 @@ ClearLastTriggers(void)
     LastTrigger.complete_through = NO_DATE;
     LastTrigger.max_overdue = -1;
     FreeTrig(&LastTrigger);
+
     LastTimeTrig.ttime = NO_TIME;
+    LastTimeTrig.ttime_orig = NO_TIME;
     LastTimeTrig.delta = NO_DELTA;
     LastTimeTrig.rep   = NO_REP;
     LastTimeTrig.duration = NO_TIME;
@@ -2098,6 +2115,9 @@ SaveLastTrigger(Trigger const *t)
     LastTrigger.infos = NULL;
     DBufInit(&(LastTrigger.tags));
 
+    if (LastTrigger.tz) {
+        LastTrigger.tz = StrDup(LastTrigger.tz);
+    }
     DBufPuts(&(LastTrigger.tags), DBufValue(&(t->tags)));
     TrigInfo *cur = t->infos;
     while(cur) {

src/protos.h

@@ -296,3 +296,8 @@ void remove_trailing_newlines(DynamicBuffer *buf);
 void set_cloexec(int fd);
 int system_to_stderr(char const *cmd);
 int system1(char const *cmd);
+int tz_set_tz (char const *tz);
+int tz_convert(int year, int month, int day, int hour, int minute, char const *src_tz, char const *tgt_tz, struct tm *tm);
+int AdjustTriggerForTimeZone(Trigger *trig, int dse, TimeTrig *tim);
+void EnterTimezone(char const *tz);
+void ExitTimezone(char const *tz);

src/token.c

@@ -123,6 +123,7 @@ Token TokArray[] = {
     { "todo",           4,      T_Todo,         0 },
     { "translate",      5,      T_Translate,    0 },
     { "tuesday",        3,      T_WkDay,        1 },
+    { "tz",             2,      T_Tz,           0 },
     { "unset",          5,      T_UnSet,        0 },
     { "until",          5,      T_Until,        0 },
     { "warn",           4,      T_Warn,         0 },

src/trigger.c

@@ -453,6 +453,7 @@ AdjustTriggerForDuration(int today, int r, Trigger *trig, TimeTrig *tim, int sav
     /* If we have an AT, save the original event start */
     if (tim->ttime != NO_TIME) {
         trig->eventstart = MINUTES_PER_DAY * r + tim->ttime;
+        trig->eventstart_orig = trig->eventstart;
         if (tim->duration != NO_TIME) {
             trig->eventduration = tim->duration;
         }
@@ -515,6 +516,7 @@ int ComputeTrigger(int today, Trigger *trig, TimeTrig *tim,
     if (r == today) {
         if (tim->ttime != NO_TIME) {
             trig->eventstart = MINUTES_PER_DAY * r + tim->ttime;
+            trig->eventstart_orig = trig->eventstart;
             if (tim->duration != NO_TIME) {
                 trig->eventduration = tim->duration;
             }
@@ -613,6 +615,21 @@ int ComputeTriggerNoAdjustDuration(int today, Trigger *trig, TimeTrig const *tim
             omit = 0;
         }
 
+        /** FIXME: If a timed reminder moves to yesterday because of a time
+            zone adjustment, try again! */
+
+        if (trig->tz) {
+            TimeTrig copy = *tim;
+            int new_result;
+            ExitTimezone(trig->tz);
+            new_result = AdjustTriggerForTimeZone(trig, result, &copy);
+            EnterTimezone(trig->tz);
+            if (new_result + duration_days < today) {
+                nextstart = start+1;
+                start = nextstart;
+                continue;
+            }
+        }
         /** FIXME: Fix bad interaction with SATISFY... need to rethink!!! */
         if (result+duration_days >= today &&
             (trig->skip != SKIP_SKIP || !omit)) {

src/types.h

@@ -141,6 +141,7 @@ typedef struct {
     int priority;
     int duration_days;           /* Duration converted to days to search */
     int eventstart;              /* Original event start (datetime) */
+    int eventstart_orig;         /* Original event start in TZ (datetime) */
     int eventduration;           /* Original event duration (minutes) */
     int maybe_uncomputable;      /* Suppress "can't compute trigger" warnings */
     int addomit;                 /* Add trigger date to global OMITs */
@@ -152,10 +153,12 @@ typedef struct {
     DynamicBuffer tags;
     char passthru[PASSTHRU_LEN+1];
     TrigInfo *infos;
+    char const *tz;              /* Time Zone */
 } Trigger;
 
 /* A time trigger */
 typedef struct {
+    int ttime_orig;
     int ttime;
     int nexttime;
     int delta;
@@ -226,6 +229,7 @@ typedef Parser *ParsePtr;  /* Pointer to parser structure */
 #define DB_TRANSLATE    0x100
 #define DB_NONCONST     0x200
 #define DB_UNUSED_VARS  0x400
+#define DB_SWITCH_ZONE  0x800
 
 /* Enumeration of the tokens */
 enum TokTypes
@@ -239,8 +243,8 @@ enum TokTypes
   T_Omit, T_OmitFunc, T_Once, T_Ordinal, T_Pop, T_PopFuncs, T_PopVars,
   T_Preserve, T_Priority, T_Push, T_PushFuncs, T_PushVars, T_Rem,
   T_RemType, T_Rep, T_Return, T_Scanfrom, T_Sched, T_Set, T_Skip, T_Tag,
-  T_Through, T_Time, T_Todo, T_Translate, T_UnSet, T_Until, T_Warn, T_WkDay,
-  T_Year
+  T_Through, T_Time, T_Todo, T_Translate, T_Tz, T_UnSet, T_Until, T_Warn,
+  T_WkDay, T_Year,
 };
 
 /* The structure of a token */

tests/Makefile

@@ -0,0 +1,2 @@
+%:
+	@make -s -C.. $@

tests/test-rem

@@ -33,7 +33,7 @@ fi
 alias remind="echo You should be using ../src/remind explicitly in test-rem >&2; exit 1"
 
 # Set a known timezone so moon phases show up in predictable places
-TZ=UTC
+TZ=Universal
 export TZ
 
 # If we're already in a utf-8 locale, do

tests/test-timezone-support

@@ -0,0 +1,160 @@
+#!/bin/sh
+DIR=`dirname $0`
+cd $DIR
+if test $? != 0 ; then
+    echo ""
+    echo "Unable to cd $DIR" >&2
+    echo ""
+    exit 1
+fi
+
+if test `id -u` = 0 ; then
+    echo ""
+    echo "*** Please do not run the test suite as root; it will fail."
+    echo ""
+    exit 1
+fi
+
+# We alias "remind" here so that we don't inadvertently add code that
+# runs the system-installed verion of Remind rather than
+# ../src/remind.  This trick was suggested by Jochen Sprickerhof
+alias remind="echo You should be using ../src/remind explicitly in test-rem >&2; exit 1"
+
+REMIND="../src/remind -h -q --flush"
+OUT=../tests/tz.out
+CMP=../tests/tz.cmp
+
+echo -n "" > $OUT 2>&1
+
+TZ=Europe/Amsterdam $REMIND - 2025-09-03@14:00 <<'EOF' >> $OUT 2>&1
+SET $AddBlankLines=0
+BANNER %
+REM Fri AT 23:30 TZ America/Toronto +1000 SATISFY [$Td == 13] MSG Fri 13th @23:30 Eastern is %a %2 here
+DEBUG +x
+SET a $T
+SET b $Tt
+SET c trigtz()
+SET d trigtime()
+SET e trigtimetz()
+SET f trigeventstart()
+SET g trigeventstarttz()
+DEBUG -x
+EOF
+
+TZ=Europe/Amsterdam $REMIND - 2026-02-14@14:00 <<'EOF' >> $OUT 2>&1
+SET $AddBlankLines=0
+BANNER %
+REM Fri AT 23:30 TZ America/Toronto +1000 SATISFY [$Td == 13] MSG Fri 13th @23:30 Eastern is %a %2 here
+DEBUG +x
+SET a $T
+SET b $Tt
+SET c trigtz()
+SET d trigtime()
+SET e trigtimetz()
+SET f trigeventstart()
+SET g trigeventstarttz()
+DEBUG -x
+EOF
+
+TZ=Europe/Amsterdam $REMIND - 2026-02-15@14:00 <<'EOF' >> $OUT 2>&1
+SET $AddBlankLines=0
+BANNER %
+REM Fri AT 23:30 TZ America/Toronto +1000 SATISFY [$Td == 13] MSG Fri 13th @23:30 Eastern is %a %2 here
+SET a $T
+SET b $Tt
+SET c trigtz()
+SET d trigtime()
+SET e trigtimetz()
+SET f trigeventstart()
+SET g trigeventstarttz()
+EOF
+
+TZ=America/Toronto $REMIND -p12 - 2025-01-01 <<'EOF' 2>&1 | grep Locally >> $OUT 2>&1
+REM Second Thursday AT 15:00 TZ Europe/Amsterdam MSG Locally: %3
+EOF
+
+TZ=America/Toronto $REMIND -g - 2026-01-01 <<'EOF' >> $OUT 2>&1
+BANNER %
+SET $AddBlankLines 0
+SET new   '2026-01-18@14:53'
+SET first '2026-01-25@23:48'
+SET full  '2026-01-03@05:04'
+SET last  '2026-01-10@10:49'
+
+REM [new]   +100 MSG New Moon      %*l %3.
+
+SET a trigtz()
+SET b trigtime()
+SET c trigtimetz()
+SET d trigeventstart()
+SET e trigeventstarttz()
+
+REM MSG trigtz = [a], trigtime = [b], trigtimetz = [c], trigeventstart = [d], trigeventstarttz = [e]
+
+REM [first] +100 MSG First Quarter %*l %3.
+REM [full]  +100 MSG Full Moon     %*l %3.
+REM [last]  +100 MSG Last Quarter  %*l %3.
+
+SET new   tzconvert(new,   "America/Toronto", "Australia/Sydney")
+SET first tzconvert(first, "America/Toronto", "Australia/Sydney")
+SET full  tzconvert(full,  "America/Toronto", "Australia/Sydney")
+SET last  tzconvert(last,  "America/Toronto", "Australia/Sydney")
+
+REM [new]   +100 TZ Australia/Sydney MSG New Moon      %*l %3. (*)
+
+SET a trigtz()
+SET b trigtime()
+SET c trigtimetz()
+SET d trigeventstart()
+SET e trigeventstarttz()
+
+REM MSG trigtz = [a], trigtime = [b], trigtimetz = [c], trigeventstart = [d], trigeventstarttz = [e]
+
+REM [first] +100 TZ Australia/Sydney MSG First Quarter %*l %3. (*)
+REM [full]  +100 TZ Australia/Sydney MSG Full Moon     %*l %3. (*)
+REM [last]  +100 TZ Australia/Sydney MSG Last Quarter  %*l %3. (*)
+
+REM MSG new=[new] first=[first] full=[full] last=[last]
+
+EOF
+
+TZ=America/Los_Angeles $REMIND - 2026-01-01 <<'EOF' >> $OUT 2>&1
+BANNER %
+SET $AddBlankLines 0
+
+REM AT 13:33 MSG Whatsup? %*l %3.
+REM AT 13:33 TZ "" MSG Whatsup? %*l %3.
+EOF
+
+TZ=America/Los_Angeles $REMIND - 2026-01-01 <<'EOF' >> $OUT 2>&1
+BANNER %
+SET $AddBlankLines 0
+
+REM AT 13:33 TZ America/Los_Angeles TZ Universal MSG Whatsup? %*l %3.
+REM AT 13:33 TZ "" TZ America/Los_Angeles MSG Whatsup? %*l %3.
+REM TZ Universal MSG Borked
+EOF
+
+TZ=America/Toronto $REMIND -dx - <<'EOF' >> $OUT 2>&1
+SET a tzconvert('2025-09-01@14:44', "", "Europe/Berlin")
+SET a tzconvert('2025-09-01@14:44', "America/Toronto", "Europe/Berlin")
+SET a tzconvert('2025-09-01@14:44', "Europe/Berlin", "")
+SET a tzconvert('2025-09-01@14:44', "Europe/Berlin")
+SET a tzconvert('2025-09-01@14:44', "", "")
+SET a tzconvert('2025-09-01@14:44', "")
+EOF
+
+cmp -s $OUT $CMP
+if [ "$?" = "0" ] ; then
+    echo "Remind:   Time zone test PASSED"
+    exit 0
+else
+    echo "Remind:   Time zone test FAILED"
+    echo "Examine the file tz.out to see where it differs from the"
+    echo "reference file tz.cmp.  Here are the first 200 lines of"
+    echo "diff -u tz.out tz.cmp"
+    echo ""
+    diff -u $OUT $CMP | head -n 200
+    echo ""
+    exit 1
+fi

tests/test.cmp

@@ -1045,7 +1045,7 @@ set a057 value("a05"+"6")
 "a05" + "6" => "a056"
 value("a056") => "SDFJHSDF KSJDFH KJSDFH KSJDFH"
 set a058 version()
-version() => "06.00.02"
+version() => "06.01.00"
 set a059 wkday(today())
 today() => 1991-02-16
 wkday(1991-02-16) => "Saturday"
@@ -2608,7 +2608,7 @@ a056  "SDFJHSDF KSJDFH KJSDFH KSJDFH"
 a007  "1991-02-16"
 a057  "SDFJHSDF KSJDFH KJSDFH KSJDFH"
 a008  "11:44"
-a058  "06.00.02"
+a058  "06.01.00"
 a059  "Saturday"
 a010  12
 a060  6
@@ -5561,8 +5561,8 @@ REM SATISFY ""
 REM SATISFY [version() > "01.00.00"]
 ../tests/test.rem(1074): SATISFY: expression has no reference to trigdate() or $T...
 ../tests/test.rem(1074): Trig = Saturday, 16 February, 1991
-version() => "06.00.02"
-"06.00.02" > "01.00.00" => 1
+version() => "06.01.00"
+"06.01.00" > "01.00.00" => 1
 ../tests/test.rem(1074): Trig(satisfied) = Saturday, 16 February, 1991
 REM SATISFY [max(x, max(x, 1, 2, 3), 4, 5, 6) * 5]
 ../tests/test.rem(1075): SATISFY: expression has no reference to trigdate() or $T...
@@ -23658,7 +23658,7 @@ SECURITY: Won't read world-writable file or directory!
 Error reading include_dir/ww: Can't open file
 SECURITY: Won't read world-writable file or directory!
 Error reading include_dir/ww: No files matching *.rem
-06.00.02
+06.01.00
 Enabling test mode: This is meant for the acceptance test.
 Do not use --test in production.
 In test mode, the system time is fixed at 2025-01-06@19:00
@@ -24485,6 +24485,7 @@ through
 todo
 trans
 translate
+tz
 unset
 until
 warn
@@ -24642,6 +24643,7 @@ trigdelta
 trigduration
 trigeventduration
 trigeventstart
+trigeventstarttz
 trigfrom
 trigger
 triginfo
@@ -24654,6 +24656,8 @@ trigtags
 trigtime
 trigtimedelta
 trigtimerep
+trigtimetz
+trigtz
 triguntil
 trigvalid
 typeof
@@ -24987,6 +24991,8 @@ TRANSLATE "Time limit for expression evaluation exceeded" ""
 TRANSLATE "COMPLETE-THROUGH specified without TODO" ""
 TRANSLATE "MAX-OVERDUE specified twice" ""
 TRANSLATE "MAX-OVERDUE specified without TODO" ""
+TRANSLATE "TZ specified twice" ""
+TRANSLATE "TZ specified for non-timed reminder" ""
 
 # Other Messages
 TRANSLATE "%s function `%s' defined at %s(%s) does not use its argument" ""
@@ -25004,6 +25010,7 @@ TRANSLATE "Cannot stat %s - not running as daemon!" ""
 TRANSLATE "Cannot use AT clause in multitrig() function" ""
 TRANSLATE "Do not use ["["]] around expression in SET command" ""
 TRANSLATE "Duplicate INFO headers are not permitted" ""
+TRANSLATE "Error adjusting trigger to local time zone" ""
 TRANSLATE "Error: THROUGH date earlier than start date" ""
 TRANSLATE "Executing `%s' for INCLUDECMD and caching as `%s'" ""
 TRANSLATE "Found cached directory listing for `%s'" ""

tests/tz.cmp

@@ -0,0 +1,51 @@
+Fri 13th @23:30 Eastern is on Saturday, 14 February, 2026 at 5:30am here
+$T => 2026-02-14
+$Tt => 05:30
+trigtz() => "America/Toronto"
+trigtime() => 05:30
+trigtimetz() => 23:30
+trigeventstart() => 2026-02-14@05:30
+trigeventstarttz() => 2026-02-13@23:30
+Fri 13th @23:30 Eastern is today at 5:30am here
+$T => 2026-02-14
+$Tt => 05:30
+trigtz() => "America/Toronto"
+trigtime() => 05:30
+trigtimetz() => 23:30
+trigeventstart() => 2026-02-14@05:30
+trigeventstarttz() => 2026-02-13@23:30
+Fri 13th @23:30 Eastern is on Saturday, 14 March, 2026 at 4:30am here
+2025/01/09 * * * 540 9:00am Locally: at 09:00
+2025/02/13 * * * 540 9:00am Locally: at 09:00
+2025/03/13 * * * 600 10:00am Locally: at 10:00
+2025/04/10 * * * 540 9:00am Locally: at 09:00
+2025/05/08 * * * 540 9:00am Locally: at 09:00
+2025/06/12 * * * 540 9:00am Locally: at 09:00
+2025/07/10 * * * 540 9:00am Locally: at 09:00
+2025/08/14 * * * 540 9:00am Locally: at 09:00
+2025/09/11 * * * 540 9:00am Locally: at 09:00
+2025/10/09 * * * 540 9:00am Locally: at 09:00
+2025/11/13 * * * 540 9:00am Locally: at 09:00
+2025/12/11 * * * 540 9:00am Locally: at 09:00
+trigtz = , trigtime = 14:53, trigtimetz = 14:53, trigeventstart = 2026-01-18@14:53, trigeventstarttz = 2026-01-18@14:53
+trigtz = Australia/Sydney, trigtime = 14:53, trigtimetz = 06:53, trigeventstart = 2026-01-18@14:53, trigeventstarttz = 2026-01-19@06:53
+new=2026-01-19@06:53 first=2026-01-26@15:48 full=2026-01-03@21:04 last=2026-01-11@02:49
+Full Moon     2026-01-03 at 05:04.
+Full Moon     2026-01-03 at 05:04. (*)
+Last Quarter  2026-01-10 at 10:49.
+Last Quarter  2026-01-10 at 10:49. (*)
+New Moon      2026-01-18 at 14:53.
+New Moon      2026-01-18 at 14:53. (*)
+First Quarter 2026-01-25 at 23:48.
+First Quarter 2026-01-25 at 23:48. (*)
+Whatsup? today at 13:33.
+Whatsup? today at 13:33.
+-stdin-(4): TZ specified twice
+-stdin-(5): TZ specified twice
+-stdin-(6): TZ specified for non-timed reminder
+tzconvert(2025-09-01@14:44, "", "Europe/Berlin") => 2025-09-01@20:44
+tzconvert(2025-09-01@14:44, "America/Toronto", "Europe/Berlin") => 2025-09-01@20:44
+tzconvert(2025-09-01@14:44, "Europe/Berlin", "") => 2025-09-01@08:44
+tzconvert(2025-09-01@14:44, "Europe/Berlin") => 2025-09-01@08:44
+tzconvert(2025-09-01@14:44, "", "") => 2025-09-01@14:44
+tzconvert(2025-09-01@14:44, "") => 2025-09-01@14:44