Why don't you store the values individually as keys, and format them directly when printing?

I think of a structure ordered by "logical size" of each value:

Year -> Month -> Day -> Hour -> Minute -> Second 
%Date_Time = (
  Year => {
    Month => {
      Day => {
        Hour => {
          Minute => {
            Second => 1,
          },
        },
      },
    },
  },
);

for my $year ( sort keys %Date_Time ) {

  for my $month ( sort keys %{ $Date_Time{$year} } ) {

    for my $day ( sort keys %{ $Date_Time{$year}->{$month} } ) {

      my $time_r = $Date_Time{$year}->{$month}->{$day};

      for my $hour ( sort keys %$time_r ) {

        for my $minute ( sort keys %{ $time_r->{$hour} } ) {

          for my $second ( sort keys %{ $time_r->{$hour}->{$minute} } 
+) {

            printf "Date: %d-%d-%d %02d:%02d:%02d\n",
             $day, $month, $year, $hour, $minute, $second;
         }
      }
    }
  }
}

[download]

In reply to Re: Sort Hash array using date by linuxer
in thread Sort Hash array using date by madtoperl

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.