diff --git a/man/remind.1.in b/man/remind.1.in
index 969d2e0e..00022f5f 100644
--- a/man/remind.1.in
+++ b/man/remind.1.in
@@ -3373,6 +3373,12 @@ Creates a \fBTIME\fR with the hour and minute components specified by
 Returns a \fBTIME\fR object representing the time portion of
 \fIdatetime\fR.
 .TP
+.B timezone([dq_datetime])
+Returns a string representing the time zone name of the given \fBDATETIME\fR.
+If no argument is supplied, \fBRemind\fR uses the value of \fBcurrent()\fR.  If
+a \fBDATE\fR rather than \fBDATETIME\fR is supplied, \fBRemind\fR uses a
+time part of 00:00.
+.TP
 .B today()
 Returns \fBRemind\fR's notion of "today."  This may be the actual system
 date, or a date supplied on the command line, or the date of the
diff --git a/src/funcs.c b/src/funcs.c
index d642a512..281606b2 100644
--- a/src/funcs.c
+++ b/src/funcs.c
@@ -129,6 +129,7 @@ static int FSunrise        (func_info *);
 static int FSunset         (func_info *);
 static int FTime           (func_info *);
 static int FTimepart       (func_info *);
+static int FTimezone       (func_info *);
 static int FToday          (func_info *);
 static int FTrig           (func_info *);
 static int FTrigback       (func_info *);
@@ -287,6 +288,7 @@ BuiltinFunc Func[] = {
     {   "sunset",       0,      1,      0,          FSunset },
     {   "time",         2,      2,      1,          FTime   },
     {   "timepart",     1,      1,      1,          FTimepart },
+    {   "timezone",     0,      1,      1,          FTimezone },
     {   "today",        0,      0,      0,          FToday  },
     {   "trig",         0,      NO_MAX, 0,          FTrig },
     {   "trigback",     0,      0,      0,          FTrigback },
@@ -2229,6 +2231,46 @@ static int FTimeStuff(int wantmins, func_info *info)
     return OK;
 }
 
+static int FTimezone(func_info *info)
+{
+    int yr, mon, day, hr, min, jul, now;
+    struct tm local, *withzone;
+    time_t t;
+    char buf[64];
+
+    if (Nargs == 0) {
+        jul = JulianToday;
+        now = (SystemTime(0) / 60);
+    } else {
+        if (!HASDATE(ARG(0))) return E_BAD_TYPE;
+        jul = DATEPART(ARG(0));
+        if (HASTIME(ARG(0))) {
+            now = TIMEPART(ARG(0));
+        } else {
+            now = 0;
+        }
+    }
+    FromJulian(jul, &yr, &mon, &day);
+    hr = now / 60;
+    min = now % 60;
+
+    memset(&local, 0, sizeof(local));
+    local.tm_sec = 0;
+    local.tm_min = min;
+    local.tm_hour = hr;
+    local.tm_mday = day;
+    local.tm_mon = mon;
+    local.tm_year = yr-1900;
+    local.tm_isdst = -1;
+
+    t = mktime(&local);
+    withzone = localtime(&t);
+    buf[0] = 0;
+    tzset();
+    strftime(buf, sizeof(buf), "%Z", withzone);
+    return RetStrVal(buf, info);
+}
+
 static int FLocalToUTC(func_info *info)
 {
     int yr, mon, day, hr, min, jul;
@@ -2241,6 +2283,7 @@ static int FLocalToUTC(func_info *info)
     hr = TIMEPART(ARG(0))/60;
     min = TIMEPART(ARG(0))%60;
 
+    memset(&local, 0, sizeof(local));
     local.tm_sec = 0;
     local.tm_min = min;
     local.tm_hour = hr;
@@ -2277,6 +2320,7 @@ static int FUTCToLocal(func_info *info)
     setenv("TZ", "UTC", 1);
     tzset();
 
+    memset(&utc, 0, sizeof(utc));
     utc.tm_sec = 0;
     utc.tm_min = min;
     utc.tm_hour = hr;
diff --git a/tests/test-rem b/tests/test-rem
index d0f49c2e..d9d643ec 100644
--- a/tests/test-rem
+++ b/tests/test-rem
@@ -370,6 +370,7 @@ EOF
 ../src/remind -cu '-i$SuppressLRM=1' ../tests/utf-8.rem 1 Nov 2019 >> ../tests/test.out
 
 TZ=America/Toronto ../src/remind -dxe ../tests/tz.rem >> ../tests/test.out 2>&1
+TZ=Europe/Berlin ../src/remind -dxe ../tests/tz.rem >> ../tests/test.out 2>&1
 
 # Remove references to SysInclude, which is build-specific
 grep -F -v '$SysInclude' < ../tests/test.out > ../tests/test.out.1 && mv -f ../tests/test.out.1 ../tests/test.out
diff --git a/tests/test.cmp b/tests/test.cmp
index a99fb2e7..2343e9cc 100644
--- a/tests/test.cmp
+++ b/tests/test.cmp
@@ -8460,4 +8460,67 @@ utctolocal(2022-11-06@07:01) => 2022-11-06@02:01
 set b utctolocal('2022-12-01@17:00')
 utctolocal(2022-12-01@17:00) => 2022-12-01@12:00
 
+set c timezone('2022-07-01')
+timezone(2022-07-01) => "EDT"
+set c timezone('2022-12-01')
+timezone(2022-12-01) => "EST"
+
+No reminders.
+# Test conversion between local time and UTC
+
+set a localtoutc('2022-01-01@12:00')
+localtoutc(2022-01-01@12:00) => 2022-01-01@11:00
+set a localtoutc('2022-03-13@02:59')
+localtoutc(2022-03-13@02:59) => 2022-03-13@01:59
+set a localtoutc('2022-03-13@03:00')
+localtoutc(2022-03-13@03:00) => 2022-03-13@02:00
+set a localtoutc('2022-03-13@03:01')
+localtoutc(2022-03-13@03:01) => 2022-03-13@02:01
+set a localtoutc('2022-06-01@12:00')
+localtoutc(2022-06-01@12:00) => 2022-06-01@10:00
+set a localtoutc('2022-11-06@01:59')
+localtoutc(2022-11-06@01:59) => 2022-11-06@00:59
+set a localtoutc('2022-11-06@02:00')
+localtoutc(2022-11-06@02:00) => 2022-11-06@01:00
+set a localtoutc('2022-11-06@02:01')
+localtoutc(2022-11-06@02:01) => 2022-11-06@01:01
+set a localtoutc('2022-12-01@12:00')
+localtoutc(2022-12-01@12:00) => 2022-12-01@11:00
+
+set b utctolocal('2022-01-01@17:00')
+utctolocal(2022-01-01@17:00) => 2022-01-01@18:00
+set b utctolocal('2022-03-13@06:00')
+utctolocal(2022-03-13@06:00) => 2022-03-13@07:00
+set b utctolocal('2022-03-13@06:01')
+utctolocal(2022-03-13@06:01) => 2022-03-13@07:01
+set b utctolocal('2022-03-13@06:59')
+utctolocal(2022-03-13@06:59) => 2022-03-13@07:59
+set b utctolocal('2022-03-13@07:00')
+utctolocal(2022-03-13@07:00) => 2022-03-13@08:00
+set b utctolocal('2022-03-13@07:01')
+utctolocal(2022-03-13@07:01) => 2022-03-13@08:01
+set b utctolocal('2022-03-13@07:59')
+utctolocal(2022-03-13@07:59) => 2022-03-13@08:59
+set b utctolocal('2022-06-01@16:00')
+utctolocal(2022-06-01@16:00) => 2022-06-01@18:00
+set b utctolocal('2022-11-06@05:59')
+utctolocal(2022-11-06@05:59) => 2022-11-06@06:59
+set b utctolocal('2022-11-06@06:00')
+utctolocal(2022-11-06@06:00) => 2022-11-06@07:00
+set b utctolocal('2022-11-06@06:01')
+utctolocal(2022-11-06@06:01) => 2022-11-06@07:01
+set b utctolocal('2022-11-06@06:59')
+utctolocal(2022-11-06@06:59) => 2022-11-06@07:59
+set b utctolocal('2022-11-06@07:00')
+utctolocal(2022-11-06@07:00) => 2022-11-06@08:00
+set b utctolocal('2022-11-06@07:01')
+utctolocal(2022-11-06@07:01) => 2022-11-06@08:01
+set b utctolocal('2022-12-01@17:00')
+utctolocal(2022-12-01@17:00) => 2022-12-01@18:00
+
+set c timezone('2022-07-01')
+timezone(2022-07-01) => "CEST"
+set c timezone('2022-12-01')
+timezone(2022-12-01) => "CET"
+
 No reminders.
diff --git a/tests/tz.rem b/tests/tz.rem
index b89bd89f..cfce165b 100644
--- a/tests/tz.rem
+++ b/tests/tz.rem
@@ -25,3 +25,6 @@ set b utctolocal('2022-11-06@06:59')
 set b utctolocal('2022-11-06@07:00')
 set b utctolocal('2022-11-06@07:01')
 set b utctolocal('2022-12-01@17:00')
+
+set c timezone('2022-07-01')
+set c timezone('2022-12-01')