How to validate date with format “MMM DD, YYYY h:mm:ss A” in JavaScript?

Question

I want to validate the date format on an input using the format MMM DD, YYYY h:mm:ss A. i tried below, but didnt work:

var r = /^(((0[13578]|1[02])[\/\.-](0[1-9]|[12]\d|3[01])[\/\.-]((19|[2-9]\d)\d{2})\s(0[0-9]|1[0-2]):(0[0-9]|[1-59]\d):(0[0-9]|[1-59]\d)\s(AM|am|PM|pm))|((0[13456789]|1[012])[\/\.-](0[1-9]|[12]\d|30)[\/\.-]((19|[2-9]\d)\d{2})\s(0[0-9]|1[0-2]):(0[0-9]|[1-59]\d):(0[0-9]|[1-59]\d)\s(AM|am|PM|pm))|((02)[\/\.-](0[1-9]|1\d|2[0-8])[\/\.-]((19|[2-9]\d)\d{2})\s(0[0-9]|1[0-2]):(0[0-9]|[1-59]\d):(0[0-9]|[1-59]\d)\s(AM|am|PM|pm))|((02)[\/\.-](29)[\/\.-]((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))\s(0[0-9]|1[0-2]):(0[0-9]|[1-59]\d):(0[0-9]|[1-59]\d)\s(AM|am|PM|pm)))$/g;
r.test("Dec 08, 2015 3:11:00 AM");

i'm not really good at regex, any help would be appreciated!!

Thanks!

Dupe, dude: http://stackoverflow.com/questions/7388001/javascript-regex-to-validate-date-format — Jan, Jan 28 '16 at 21:28
Date validation using regular expressions is not a good idea — leo.fcx, Jan 28 '16 at 21:34

score -1 · Accepted Answer · answered Jan 28 '16 at 21:35

Regex isn't so great dealing with dates. For example, it's not suitable for differentiating between 30 or 31 days months. Your attempt further demonstrates how unreasonable it is, you've created an unreadable, unmaintainable expression and its virtually impossible to test or fix.

Instead, use a dedicated date/time component (either existing if it fits your requirements, or develop one yourself).

How to validate date with format “MMM DD, YYYY h:mm:ss A” in JavaScript?

1 Answers1