How to validate 12-Hour Time with regex (regular Expression)

Question

I want to validate a 12-Hours time format like (01:05 PM) in PHP, Javascript and HTML.

I tried this:

((([1-9])|(1[0-2])):([0-5])(0|5)\s(A|P)M)

But I don't know why it doesn't work.

Answer 1

Try ,

^(1[0-2]|0?[1-9]):[0-5][0-9] (AM|PM)$ 

You may test here