Comments on: How to validate date using Java regular expression

By: dean

dean — Fri, 20 Jan 2012 19:04:47 +0000

Just put the limitation as:

function validate_date(date)
{
var pattern= new RegExp(“^(0[1-9]|1[012])[/]?(0[1-9]|[12][0-9]|3[01])[/]?(2012)\$”);
return pattern.test(date);
}

if(!validate_date(data_date)){
alert(‘Invalid Date. Correct format is dd/mm/yyyy’);
return false;
}

so, user may type / symbol only..

By: sam

sam — Tue, 02 Aug 2011 12:10:03 +0000

Hi,
I wonder after testing date “12/30-2011″ as an argument for ur regex pattern, which is giving true as return.

ur code is right but the patten u’ve used is not absolute for date validation.

Thanks!

By: ch3etah

ch3etah — Wed, 01 Jun 2011 21:19:04 +0000

CED’s regex expression is OK, still doesn’t take into account the fact that 30/02/1945 is not a valid date. It’s quite complicate to verify a date as a correct one. One might use SimpleDateFormat to validate it. The problem persist as 02/02/4325 is valid and yet not a valid DOB.
Great article nonetheless, as I’m struggling with regex.

By: Michael

Michael — Tue, 12 Apr 2011 20:09:15 +0000

Bravo CED, you just saved a LOT of my time !

By: Roger

Roger — Fri, 11 Feb 2011 13:57:11 +0000

I have been struggling with regex for a good while in one of my project, which eventually one day becoma a working spider, but to be honest I have never thought that this tool can be used for date validatin also, thanks for sharing your knowledge Zaheer

By: Zhahmed

Zhahmed — Mon, 25 Oct 2010 08:34:02 +0000

great articles and great regex CED !! Thanks

By: Ced

Ced — Thu, 27 May 2010 20:21:18 +0000

Your Date regex is incorrect; you have it set to collect months between 01-19 which isn’t valid.

it should be:

“^(0[1-9]|1[012])[- / ]?(0[1-9]|[12][0-9]|3[01])[- /]?(19|20)\\d{2}$”

Regardless, great explanations. I appreciate your explanations of the email, ssn, and phone. I didn’t understand the syntax before. Now I do.