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Re: Calc last friday of month

by ikegami (Pope)
on Feb 03, 2009 at 04:50 UTC ( #740899=note: print w/replies, xml ) Need Help??

in reply to Calc last friday of month

  1. Find the day of the week of the first day of the month (using Date::Calc, DateTime, localtime or whatever).

  2. Find the number of days to add or subtract.

    Days to first Monday:

    $days_to_first_monday = ($dow + 7 - 1) % 7;

    Days to previous Friday:

    $days_to_last_friday = ($dow + 7 - 5) % 7 - 7;

    In both case, $dow is expected to hold 1..7 for Mon..Sun or 0..6 for Sun..Sat

  3. Use Date::Calc or DateTime to perform the math.

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