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Christian Studer
Asked: 2010-01-30 02:02:43 +0800 CST

How do I set a time zone for a crontab?

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I would like to use UTC for the scheduling times in a crontab for a single user, regardless of the current time zone of the server. How do I do this on Debian Etch?

cron timezone debian-etch utc

2 Answers

  1. Best Answer

    you can set the variable TZ in /etc/default/cron. but this is the timezone for all crontabs.

    another alternative is using fcron. the documentation shows an option to set the timezone in each crontab.

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  2. Some cron installations use CRON_TZ to set the per-user interpretation of the crontab times.

    Here's part of man 5 crontab on Centos 7:

    The CRON_TZ variable specifies the time zone specific for the cron table. The user should enter a time according to the specified time zone into the table. The time used for writing into a log file is taken from the local time zone, where the daemon is running.

    Default Debian uses a patched vixiecron, (per https://wiki.debian.org/cron) and does not support per-user time zone functionality. If you set a variable in the crontab, it passes to the child jobs, but does not affect the TZ of the parent cron job. Debian has a 'cronie' package in experimental that supports the CRON_TZ functionality.

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