diff --git a/src/backend/utils/adt/date.c b/src/backend/utils/adt/date.c
index b141a1a949a..52973055105 100644
--- a/src/backend/utils/adt/date.c
+++ b/src/backend/utils/adt/date.c
@@ -2721,6 +2721,8 @@ timetz_zone(PG_FUNCTION_ARGS)
 		struct pg_tm *tm;
 
 		tm = pg_localtime(&now, tzp);
+		tm->tm_year += 1900;	/* adjust to PG conventions */
+		tm->tm_mon += 1;
 		tz = DetermineTimeZoneAbbrevOffset(tm, tzname, tzp);
 	}
 	else