I'd probably write the thanksgiving function like this, because the keep-adding-one pattern gives me the jibblies. 
    my $dt = DateTime->new(year=>$year, month=>11, day=>22);
    $dt->add(days=>(4 - $dt->dow())%7);

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In reply to Re^2: Calculating holidays by Anonymous Monk
in thread Calculating holidays by htmanning

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