how to get 3rd week of every friday?

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08-23-2012

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Good idea how about:

Code:

cal | awk ' --NF&&$NF+0{print $NF+14; exit}'

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08-31-2012

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If a little extra tool is fine have a look at dateutils (http://hroptatyr.github.com/dateutils/). What you want:

dconv 2012-08-03-05 -f '%Y-%m-%d'
=>
2012-08-17

which makes use of a special calendar system to denote every day as year-month-count-weekday, where count is the occurrence of weekday in month (here 3) and weekday is a number 00 for Sun, 01 for Mon, etc.

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