Regular expression for matching HH:MM time format

Question

I want a regexp for matching time in HH:MM format. Here\'s what I have, and it works:

^[0-2][0-3]:[0-5][0-9]$

This matches everything from

Answer 1

Matches:

2:9
2:09
2:59
02:9
02:09
02:59
23:59

Use it:

^([0-9]|0[0-9]|1[0-9]|2[0-3]):([0-9]|[0-5][0-9])$