In the CB I already mentioned the modules POSIX, DateTime and Time::Piece to you, all of which supply the strftime function. What problem do you have that is not solved by the strftime function?

Example code:

use strict;
use POSIX qw(strftime);

my $filename = strftime "foo.%Y%m%d-%H%M%S.txt", localtime;
print "A good filename could be '$filename'"
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