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.

Solution 1

try this :

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

test regex here

try this for case sensitive AM|PM|am|pm : `

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

`

Solution 2

Try ,

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

You may test here

Solution 3

This will work for both pm/am and PM/AM and prefixed with or without 0(Zero)

/^(0?[1-9]|1[012])(:[0-5]\d) [APap][mM]$/

Comments

[A. MO]

I mean I need AM and PM Should not be case sensitive

[RobG]

@A.MO—because it needs to be 01:20 or 01:25 (the last group should be ([0-5][0-9]). ;-)

[bob]

(((0[1-9])|(1[0-2])):([0-5])(0|5)\s(A|P|a|p)(M|m)) : try this

[A. MO]

Thanks Guys It Worked

[arximughal]

Works like a charm <3

[axmrnv]

Remove ? after 0 to require leading zero in hour.

[Robert Penner]

Note that this answer only works if the minutes are a multiple of 5, which may not be immediately obvious in the question.

[Sean Hetzel]

The ^ at the beginning is very important because it prevents 17:30 PM from getting mistaken as 7:30 PM if the user inputs 24 hour time format by mistake.

[coolk]

this is NOT the right answer as per comment by Robert