[PATCH 12/12] tm: say when tm_zone, tm_gmtoff standardized

[Paul Eggert <eggert@xxxxxxxxxxx>]

---
 man/man3type/tm.3type | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/man/man3type/tm.3type b/man/man3type/tm.3type
index 1628e0c1f..62e928fce 100644
--- a/man/man3type/tm.3type
+++ b/man/man3type/tm.3type
@@ -100,7 +100,8 @@ and
 originate from 4.3BSD-Tahoe (where
 .I tm_zone
 is a
-.IR "char *" ).
+.IR "char *" ),
+and were first standardized in POSIX.1-2024.
 .SH NOTES
 .I tm_sec
 can represent a leap second with the value
-- 
2.45.2