From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sun, 12 Mar 2023 18:47:15 +0000 (+0900)
Subject: time-util: add note about on DST change
X-Git-Tag: v254-rc1~1053^2~1
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=37c6a3dc1a91e413ab6f949dc1d87f7749e63fb5;p=thirdparty%2Fsystemd.git

time-util: add note about on DST change
---

diff --git a/src/basic/time-util.c b/src/basic/time-util.c
index 7d44358cd84..657e231b0d4 100644
--- a/src/basic/time-util.c
+++ b/src/basic/time-util.c
@@ -662,6 +662,9 @@ static int parse_timestamp_impl(
          *   +5min
          *   -5days
          *   @2147483647          (seconds since epoch)
+         *
+         * Note, on DST change, 00:00:00 may not exist and in that case the time part may be shifted.
+         * E.g. "Sun 2023-03-13 America/Havana" is parsed as "Sun 2023-03-13 01:00:00 CDT".
          */
 
         assert(t);