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Old 03-03-2004, 12:14 PM   #1
Registered: Oct 2003
Location: Wyoming
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cron last day of every month

How would you go about writing a crontab entry for a job that would run at 11:59pm on the last day of every month? It can't be static since the days in a month varies from 28 to 31.

Also, how can you deal with leap years?
Old 03-03-2004, 12:42 PM   #2
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The crontab (5) manual page has some details on specifying hours, minutes, and days of the month (type 'man 5 crontab' to see it).

I also found this and this after some searching.

It'd probably be a lot easier to just run it on the 1st of the month at midnight
Old 03-03-2004, 09:41 PM   #3
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Digging around on the web, this is as far as I get. I'm not entirely sure if this will handle the leap year. Would appreciate if you find out to let me know.

#All months with 31 days
59 23 31 1-7/2,8-12/2 * /mnt/backup/backup.job
# All months with 30 days
59 23 30 4,6,9,11 * /mnt/backup/backup.job
#February on a normal year
59 23 28 2 * /mnt/backup/backup.job
#February on a leap year (maybe)
59 23 29 2 5 /mnt/backup/backup.job

Last edited by homey; 03-04-2004 at 12:41 AM.


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