c# - Regular expression to validate valid time

Question

Can someone help me build a regular expression to validate time?

Valid values would be from 0:00 to 23:59.

When the time is less than 10:00 it should also support one character numbers

ie: these are valid values:

• 9:00
• 09:00

Thanks

Answer 1

Try this regular expression:

^(?:[01]?[0-9]|2[0-3]):[0-5][0-9]$

Or to be more distinct:

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