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#!/usr/bin/perl
use strict;
use warnings;
...
    my @t = localtime($epoch_time);
    return sprintf("%02d %s %d", $t[3], $month[ $t[4] ], $t[5]+1900);
}

my $data= [
           [ '1', '2', '3', ],
           [ '1', '2', '3', ]
          ];