FWIW, I used
Time::Local for a one-liner:
perl -MTime::Local=timelocal -e 'print scalar localtime timelocal qw(3
+0 40 2 15 8 2012)';
Update: to get the day, date, and time 48 days ago:
#!/usr/bin/perl -l
use strict;
use autodie;
use warnings;
use POSIX 'strftime';
use Time::Local 'timelocal';
my $days_ago = '48';
($days_ago) = strftime("%d", gmtime(
time - $days_ago * 86400
));
print scalar localtime timelocal(
30, 40, 2, $days_ago, 7, 2012,
);
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