Since your dates appear to be fixed-width, and are arranged year-month-day, there's no reason why you can't use the basic sort, as mentioned above:

my @list = ('2005-12-01', '2005-11-02', '2005-12-07');
@list = sort @list;
print join "\n", @list;
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If you want them from most recent to least recent, just reverse:

@list = reverse sort @list;
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Things get a bit more difficult if your dates are arranged in a different order, but it's still fairly easy to do:

use strict;
use warnings;

my @sort = ('05-11-2006', '01-01-2005', '04-12-2005', '22-03-2005');

@sort =
    map { join '-', reverse split /-/ }
    sort
    map { join '-', reverse split /-/ }
@sort;

print join "\n", @sort;
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