OK, here's another variant without using modules.

#!/usr/local/bin/perl -w
use strict;
use warnings;

# $time = str2time($date);
my @date = ( 'Apr 8 1984',
             'apr 08 84',
             '4/8/84',
             '04/08/84',
             '08 Apr 1984',
             'April 8 1984',
             '8 april 1984');

my @months = qw/ January February March
                 April May June July August
                 September October November
                 December /;

# build month name lookup hash
my %months = map {
                   ($months[$_] => $_,
                    substr($months[$_], 0, 3) => $_)
                } 0..9;


foreach (@date) {
    my ($year, $month, $day) = parse_date($_);
    printf "%s %d %d\n", $months[$month], $day, $year;
}

sub parse_date
{
    my $date_str = shift;
    my ($year, $month, $day);

    if ($date_str =~ /\//) {
        # validate date string
        die "Invalid date format"
            if $date_str !~ /[\/0..9]/;

        # in mm/dd/[cc]yy format
        ($month, $day, $year) = split /\//, $date_str;

        # normalization
        $year = normalize_year($year);
        $month -= 1;  # zero based month, get rid of leading 0
        $day += 0;    # get rid of leading 0
    } else {
        # in alpha month, numeric day format
        ($month, $day, $year) = split /\s+/, $date_str;

        # normalization
        $year = normalize_year($year);
        ($month, $day) = ($day, $month) if $month =~ /\d/;
        $day += 0;

        $month = ucfirst $month;
        die "Invalid month" if !exists $months{$month};
        $month = $months{$month};
    }
    
    return ($year, $month, $day);
}

sub normalize_year
{
    my $year = shift;
    return length($year) == 2 ?
                $year > 30 ? $year + 1900 : $year + 2000 :
                $year;
}

[download]
And the output -
April 8 1984
April 8 1984
April 8 1984
April 8 1984
April 8 1984
April 8 1984
April 8 1984

[download]

In reply to Re: Final date conversion happiness script by Roger
in thread Final date conversion happiness script by ctp

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