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-rw-r--r--lib/libc/stdtime/strftime.36
-rw-r--r--lib/libc/stdtime/strftime.c16
2 files changed, 22 insertions, 0 deletions
diff --git a/lib/libc/stdtime/strftime.3 b/lib/libc/stdtime/strftime.3
index c4d2d8c..9b21843 100644
--- a/lib/libc/stdtime/strftime.3
+++ b/lib/libc/stdtime/strftime.3
@@ -202,6 +202,11 @@ is replaced by the year with century as a decimal number.
is replaced by the year without century as a decimal number (00-99).
.It Cm \&%Z
is replaced by the time zone name.
+.It Cm \&%z
+is replaced by the time zone offset from UTC; a leading plus sign stands for
+east of UTC, a minus sign for west of UTC, hours and minutes follow
+with two digits each and no delimiter between them (common form for
+RFC 822 date headers).
.It Cm %+
is replaced by national representation of the date and time
(the format is similar to that produced by
@@ -241,6 +246,7 @@ with a lot of extensions including
.Ql %t ,
.Ql %u ,
.Ql \&%V ,
+.Ql %z ,
.Ql %+ .
The peculiar week number and year in the replacements of
diff --git a/lib/libc/stdtime/strftime.c b/lib/libc/stdtime/strftime.c
index 9aa891f..6404d9c 100644
--- a/lib/libc/stdtime/strftime.c
+++ b/lib/libc/stdtime/strftime.c
@@ -397,6 +397,22 @@ label:
pt, ptlim);
} else pt = _add("?", pt, ptlim);
continue;
+ case 'z':
+ {
+ long absoff;
+ if (t->tm_gmtoff >= 0) {
+ absoff = t->tm_gmtoff;
+ pt = _add("+", pt, ptlim);
+ } else {
+ absoff = -t->tm_gmtoff;
+ pt = _add("-", pt, ptlim);
+ }
+ pt = _conv(absoff / 3600, "%02d",
+ pt, ptlim);
+ pt = _conv((absoff % 3600) / 60, "%02d",
+ pt, ptlim);
+ };
+ continue;
case '+':
pt = _fmt(Locale->date_fmt, t, pt, ptlim);
continue;
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