British date time regular expression dd/mm/yyyy

I came up with the following before which is not entirely correct.

^\d{2}/(\d{2})/(\d{4})+


Why? You can enter the date as 45\23\0088. This is just digit matching.

thus, i refactor to the following:


((0{1}[1-9])|([1-2][0-9])|(3{1}[0-1]))/((0{1}[1-9])|(1{1}[0-2]))/((19|20)\d\d)


This regex only allow you to enter
dd from 01-31.
mm from 01-09 and 11-12
yyyy range restricted to 19xx-20xx.


How to get it tested? Try the following flash regex engine:
http://gskinner.com/RegExr/