Date::Manip will do that (but note that it will parse your string as 2008-06-14, so you'll need to reformat it to get what you want): 
use Date::Manip;
$d = ParseDate("2014-08-06");
print UnixDate($d,"%W");

[download]
will give 32.

In reply to Re: week of the year by SBECK
in thread week of the year by fionbarr

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