Here you go 

#!/usr/bin/perl --
use strict; use warnings; use Data::Dump qw' dd ';

my %Turtles = ...;

# Find "%seen" in perlfaq4/How can I get the unique keys from two hash
+es?
my %buckets;
while( my( $name, $epoch ) = each %Turtles ) {
    my $ymd = POSIX::strftime('%Y-%m-%d', gmtime( $epoch ) );
    push @{ $buckets{ $ymd } }, $name;
}
dd \%buckets;

__END__
{
  "2012-08-09" => ["B1", "B2"],
  "2012-08-11" => ["C1", "C2"],
  "2012-08-13" => ["D1", "D2"],
  "2012-08-15" => ["A1", "A2"],
}

[download]

In reply to Re^2: Epoch get all files with same day by Anonymous Monk
in thread Epoch get all files with same day by perlrush2011

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