Cron Expression - Subtraction or Date Offset -


i'm not versed in cron expressions , struggling find out whether feasible. possible create expression every 2nd wednesday of month minus 52 days?

the 2nd wednesday of month our known starting point , want subtract off run on ongoing basis. maybe there smarter way write this?

thanks!

i don't think can directly in cron time specification. running command every sunday (52 days before wednesday sunday) , check if date 52 days future between 8 , 13, inclusive:

0 0 * * 7 date=$(date --date='now+52 days' +\%-d); [ $date -ge 8 -a $date -le 13 ] && command

(note percent signs special in crontabs , need escaped.)


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