Regular expression for matching time in military (24 hour) and civilian (23:59) format

I would like to create regex for validate times for military and civilian.

I just found this for military time.

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

I need to create pattern for start time and end time for military and civilian both. For example, I would like to match time in the following formats in textbox like.

• 10:30-19:30
• 1030-1930
• 10-19

How can validated in JavaScript?

Please help/suggest me to find the pattern

Here's one way of doing it.

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

It's basically two of yours demanding a hyphen in between. It also makes the minutes optional (by having them in an optional non capturing group (?:...)?.

Check it out here at regex101.