I prefer to use strings - in that case, it becomes easy to deal with 3 or 4 digit years as well: 
    my @dates = qw /4-10-31 14-11-31 1979-10-10/;
    for (@dates) {
        s/(\d+)/substr("2000", 0, -length($1)).$1/e;
        print "$_\n";
    }
    __END__
    2004-10-31
    2014-11-31
    1979-10-10

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Perl --((8:>*

In reply to Re^3: need regular expression by Perl Mouse
in thread need regular expression by jesuashok

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