Regular Expression Match to test for a valid year

Question

Given a value I want to validate it to check if it is a valid year. My criteria is simple where the value should be an integer with 4 characters. I know this is

Answer 1

You can also use this one.

([0-2][0-9]|3[0-1])\/([0-1][0-2])\/(19[789]\d|20[01]\d)