Path: utzoo!utgpu!cunews!bnrgate!brchh104!brchs1!bnr.ca!rice.edu!sun-spots-request
From: winfpet@duticai.tudelft.nl (Hans Petri)
Newsgroups: comp.sys.sun
Subject: CRON problem after Daylight time change
Keywords: Miscellaneous
Message-ID: <2787@brchh104.bnr.ca>
Date: 10 May 91 13:03:00 GMT
Sender: news@brchh104.bnr.ca
Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
X-Original-Date: Wed, 1 May 91 10:23:02 MET DST
X-Sun-Spots-Digest: Volume 10, Issue 100, message 13
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Craig Donath wrote:

> This week we noticed that one of our cron jobs has stopped running. It
> does not appear to have run since late Saturday sometime. 
> Cron was running, and in fact, other jobs in the same (root)
> crontab were still working OK.
> Craig Donath

I've had the same experience. I was curious about what would happen with
cron-jobs during the switch from standard-time to daylight saving time.  I
issued a job that executed the date command every 10 minutes and appended
the output to a file. This is what I saw in the file:

Sun Mar 31 00:50:00 MET 1991
Sun Mar 31 01:00:00 MET 1991
Sun Mar 31 01:10:00 MET 1991
Sun Mar 31 01:20:00 MET 1991
Sun Mar 31 01:30:00 MET 1991
Sun Mar 31 01:40:00 MET 1991
Sun Mar 31 01:50:00 MET 1991
Sun Mar 31 11:55:00 MET DST 1991

The last line is appended to the file after I modified the crontab (added
a line and immediately deleted it again) and saved it again, using crontab
-e.  Execution of the crontab-file stopped at he moment we got into
daylight saving time!

J.M. Petri
E-mail: winfpet@duticai.tudelft.nl