To convert JULY to 06, you can use s/\bJULY\b/06/ (but you have to check the context, too). You can e.g. store all the months names in an array and then replace in a loop:
my @months = qw /january february march april may june july etc/;
$x = 'january february march april may june july etc';
$x =~ s/\b\Q$months[$_]\E\b/sprintf '%02d',1+$_/e for 0 .. @months-1;
print "$x\n";

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In reply to Re: Regular expressions extract, change num to word and capitalize each word after AU: tag and add 'written by' by choroba
in thread Regular expressions extract, change num to word and capitalize each word after AU: tag and add 'written by' by allison

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