The "bug" you see is simply because months of gmtime and timegm are 0..11, and 31/11 is an invalid date (or rather, the same day as the 1/12??). You could simple you Date::Calc :

use Date::Calc 'Delta_Days';
print Delta_Days(2005,10,31,2005,11,1);

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In reply to Re: Date/Timestamp Puzzle by Ido
in thread Date/Timestamp Puzzle by Ronnie

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