But only if your input data is already sorted...
;-)
Update: And assuming (cf. Marshall's question above) that by "largest" you mean "latest".
Update 2: And of course if your date-times go back to more than 10 years ago (more precisely, to before 9 Sep 2001 03:46:40), the sort needs to be replaced by sort { $a <=> $b }.
In reply to Re: epoch reduction
by Not_a_Number
in thread epoch reduction
by neilwatson
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