I think you're working at that too hard: 
use Date::Manip;
print map UnixDate($_, "%g\n"), ParseRecur("first monday of every mont
+h in 2001");

[download]
which yields 
Mon, 01 Jan 2001 00:00:00 -0800
Mon, 05 Feb 2001 00:00:00 -0800
Mon, 05 Mar 2001 00:00:00 -0800
Mon, 02 Apr 2001 00:00:00 -0800
Mon, 07 May 2001 00:00:00 -0800
Mon, 04 Jun 2001 00:00:00 -0800
Mon, 02 Jul 2001 00:00:00 -0800
Mon, 06 Aug 2001 00:00:00 -0800
Mon, 03 Sep 2001 00:00:00 -0800
Mon, 01 Oct 2001 00:00:00 -0800
Mon, 05 Nov 2001 00:00:00 -0800
Mon, 03 Dec 2001 00:00:00 -0800

[download]
Date::Manip does everything. From the docs: 

       I'm trying to build a library which can do _EVERY_ con-
       ceivable date/time manipulation that you'll run into in
       everyday life.

[download]

-- Randal L. Schwartz, Perl hacker

In reply to Re: Re: Getting Weekly Dates by merlyn
in thread Getting Weekly Dates by mothra

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