From 10d865720bdf1938703cd25dd2e7ca0973d919d9 Mon Sep 17 00:00:00 2001
From: Ruslan Ermilov <ru@FreeBSD.org>
Date: Thu, 17 May 2001 15:20:15 +0000
Subject: [PATCH] Fix an off-by-hour bug when crossing Daylight Saving Time
 boundary.

PR:		bin/27399
Submitted by:	"Crist J. Clark" <crist.clark@globalstar.com>
MFC after:	3 days
---
 bin/date/date.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/bin/date/date.c b/bin/date/date.c
index 99ebfe660cc..b7b16568b6e 100644
--- a/bin/date/date.c
+++ b/bin/date/date.c
@@ -268,6 +268,9 @@ setthetime(fmt, p, jflag, nflag)
 		}
 	}
 
+	/* Let mktime() decide whether summer time is in effect. */
+	lt->tm_isdst = -1;
+
 	/* convert broken-down time to GMT clock time */
 	if ((tval = mktime(lt)) == -1)
 		errx(1, "nonexistent time");