Date: Thu, 21 Oct 1999 14:19:56 +0200 From: Sheldon Hearn <sheldonh@uunet.co.za> To: Graeme Tait <graeme@echidna.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Cron and daylight savings Message-ID: <53037.940508396@axl.noc.iafrica.com> In-Reply-To: Your message of "Thu, 21 Oct 1999 08:12:07 -0400." <380F0317.5C1E3A3@echidna.com>
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On Thu, 21 Oct 1999 08:12:07 -0400, Graeme Tait wrote:
> What happens if my machine is running local time with daylight savings
> adjustments, and I schedule jobs between 2 and 3 am (or whenever the
> transitions occurs)?
>
> Do they get skipped in the daylight savings transition in Spring and run
> twice in the Fall?
Yes. :-)
See the BUGS section of the new crontab(5) manpage:
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.
For US timezones (except parts of IN, AZ, and HI) the time shift
occurs at 2AM local time. For others, the output of the zdump(8)
program's verbose (-v) option can be used to determine the moment
of time shift.
Ciao,
Sheldon.
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