Yet another way, though I totally agree that a much better solution would be to use an inherently sortable format for the hash keys from the start. 

use strict;
use warnings;
use feature 'say';

my %data = ( 
             Apr14 => 2,
             Mar14 => 2,
             May14 => 2,
             Dec13 => 2,
           );  

my %month_to_num = ( 
                    Jan => '01', May => '05', Sep => '09',
                    Feb => '02', Jun => '06', Oct => '10',
                    Mar => '03', Jul => '07', Nov => '11',
                    Apr => '04', Aug => '08', Dec => '12',
                   );  
my %num_to_month = reverse %month_to_num;

say "key - $_ and value - $data{$_}" for 
            map      { s/ (\d{2}) (\d{2}) /$num_to_month{$2}$1/rx } 
            sort map { s/ (\w{3}) (\d{2}) /$2$month_to_num{$1}/rx }
            keys %data;

[download]

In reply to Re: sorting keys in hash by farang
in thread sorting keys in hash by Perlseeker_1

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.