Javascript RegEx: validate date time

Question

I am not very good with regex. I am being frustrated by a regular expression.

Example:

I have the following date time: 05/16/2013 12:00 am

I need a javascript regex that respect this format: mm/dd/yyyy hh:mm [am/pm]

 var dateReg = /^[0,1]?\d{1}\/(([0-2]?\d{1})|([3][0,1]{1}))\/(([1]{1}[9]{1}[9]{1}\d{1})|([2-9]{1}\d{3}))$/;
if(!dateReg.test(inputVal)) {
    $(this).after('<span class="error error-keyup-5">Invalid date format.</span>');
}

But this code works only for date, not with time. Thanks for your help.

Do you want your date to be valid for each country? So for example 16/5/2013 12:00 ? — Niccolò Campolungo
– Niccolò Campolungo, Commented May 18, 2013 at 17:22

Patrice Levesque · Accepted Answer · 2013-05-18 17:24:48Z

2

Your code snippet does only match the date, there are no atoms to match the time. Your regexp should be:

dateReg = /^[0,1]?\d\/(([0-2]?\d)|([3][01]))\/((199\d)|([2-9]\d{3}))\s[0-2]?[0-9]:[0-5][0-9] (am|pm)?$/

answered May 18, 2013 at 17:24

Patrice Levesque

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Community · Accepted Answer · 2017-05-23 11:49:17Z

1

A regexp for am/pm time can be found here:

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

edited May 23, 2017 at 11:49

CommunityBot

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answered May 18, 2013 at 17:25

Klas Mellbourn

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Comments

user663031 · Accepted Answer · 2013-05-18 20:46:56Z

1

You should not be parsing dates and times yourself. Find a good library to do it. d3.js contains fine support for parsing dates and times according to formats you specify. See https://github.com/mbostock/d3/wiki/Time-Formatting.

answered May 18, 2013 at 20:46

user663031

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