For the record, there is also the English_Ordinal function in the Date::Calc module, which can return the ordinal in any one of 11 languages. For that matter, both Date::Calc and Date::Manip have quite a few date-to-text functions. If you're doing a lot of manipulation, you might want to take a peek at them.

On the other hand, it's not a hard translation to do yourself, and the 3 line subs in the other replies are pretty slick. :)