localtime and friends use UNIX time which is not a completely accurate measure of how many seconds has passed since 1970. It is very easy to use, but your results will be slightly off because of the way leap seconds are treated, see Unix time.

I am not aware of any perl module that does positively treats leap seconds correctly.

In reply to Re: seconds into a date by mzedeler
in thread seconds into a date by Spooky

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