Are you implying that strftime does validation? I can't find any documentation to support that. Validation isn't needed anyway, since he's printing out the result of localtime.
Actually, what I was implying was that if the localtime was read and then a value such as month were to be incremented, then sprintf() would print out a bad date( i.e. 13/30/2005). You are correct in that passing localtime straight to strftime would not require validation, if any were to exist. Thanks.
True validation could be accomplished using Date::Calc or DateTime or similar to increment the date values.