I wouldn't use regexes for this, in large part because they're harder for people to understand, even if well commented. Instead, I'd do something like: 
my ($day_of_week, $date, $time) = split ' ', $stamp;
my ($month, $day_of_month, $year) = split '/', $date;
$time =~ s/://g;
my $munged_stamp = "${month}_${day_of_month}_${time}";

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In reply to Re: How do I use regex to strip out specific characters in a string? by dragonchild
in thread How do I use regex to strip out specific characters in a string? by Anonymous Monk

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