From 81f4b03663dc63ab01734effe636a22be0e94831 Mon Sep 17 00:00:00 2001 From: Sheldon Hearn Date: Wed, 11 Aug 1999 13:00:19 +0000 Subject: [PATCH] Christen a BUGS section for an explanation of the impact of Daylight Savings Time on cron(8). If we ever introduce some work-around code for handling jobs scheduled for a time that "doesn't happen" due to DST, the section should be renamed to IMPLEMENTATION NOTES. PR: 10947 Reported by: Scott Drassinower Submitted by: Seth Bromberger Reviewed by: mpp --- usr.sbin/cron/crontab/crontab.5 | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/usr.sbin/cron/crontab/crontab.5 b/usr.sbin/cron/crontab/crontab.5 index e6f939c9d13c..8eea24890b00 100644 --- a/usr.sbin/cron/crontab/crontab.5 +++ b/usr.sbin/cron/crontab/crontab.5 @@ -15,7 +15,7 @@ .\" * Paul Vixie uunet!decwrl!vixie!paul .\" */ .\" -.\" $Id: crontab.5,v 1.8 1998/03/23 08:21:36 charnier Exp $ +.\" $Id: crontab.5,v 1.9 1999/07/27 16:39:02 n_hibma Exp $ .\" .Dd January 24, 1994 .Dt CRONTAB 5 @@ -223,3 +223,15 @@ feature can be turned off and no mail will be sent at all (SysV can't do this either). .Sh AUTHORS .An Paul Vixie Aq paul@vix.com +.Sh BUGS +If you're in one of the 70-odd countries that observe Daylight +Savings Time, jobs scheduled during the rollback or advance will be +affected. In general, it's not a good idea to schedule jobs during +this period. +.Pp +For US timezones (except parts of IN, AZ, and HI) the time shift occurs at +2AM local time. For others, the output of the +.Xr zdump 8 +program's verbose +.Fl ( v ) +option can be used to determine the moment of time shift.