Date format Regex

Question

I have this regex to check date entry:

/^[0-9]{2}-[0-9]{2}-[0-9]{4}$|^$/

I also need it to make sure that the format MM-DD-YYYY is followed.
I've tried these and they don't work.

/^[01-12]-[01-31]-[0-9]{4}$|^$/
/^['01'-'12']-['01'-'31']-[0-9]{4}$|^$/

How can I make this also check to make sure the MM part is 01-12 and the DD part is only
01-31?

try this one: http://stackoverflow.com/questions/5465375/javascript-date-regex-dd-mm-yyyy — Zim84, May 03 '13 at 13:46
It does not seem like you are really after date check. 30th of Februari would be valid for example. — ahdaniels, May 03 '13 at 13:48
@Zim84, I modified the one there an it worked, please post as answer and I'll accept. — MB34, May 03 '13 at 13:55
@Juhana, not duplicate, the one on link that Zim84 posted worked great. Oh, BTW, thanks for the downvote by referring to the other post. — MB34, May 03 '13 at 13:58
It's pretty hard to believe the duplicate would not work if the other did. I also can't see how the downvote is my fault. — JJJ, May 03 '13 at 14:28
Not duplicate answers, that's for sure. Look at the one Zim84 provided, it is the one that led me to the solution. When you flag as duplicate it automatically gives a downvote. — MB34, May 03 '13 at 20:25
No, it doesn't. Flagging for spam gives a downvote, other flags don't. (And I didn't even flag but voted to close.) — JJJ, May 03 '13 at 20:51

score 0 · Answer 1 · answered May 03 '13 at 13:50

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try this

/^[0-1]{1}[1-2]{1}-[0-3]{1}[1-2]{1}-[0-9]{4}$|^$/

answered May 03 '13 at 13:50

NPKR

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I think it invalidates anything starting with 10 or has 30 in the date(day) and validates date of 32. Should it not be /^[0-1]{1}[0-2]{1}-[0-3]{1}[01]{1}-[0-9]{4}$|^$/ It'll still say 31st of Feb is valid or 00 of 00 but it's close. – HMR May 03 '13 at 14:01

score 0 · Answer 2 · answered May 03 '13 at 13:57

Kind of crazy going with pure regex, i would go with regex + condition check as follows:

check with regex /^[0-9]{1,2}-[0-9]{1,2}-[0-9]{4}$/
// assuming myDate is ur string

var dateParts = myDate.split('-'); var bDateIsValid = ( Number( dateParts[0] ) <= 12 && Number( dateParts[0] ) >=1 ) && ( Number( dateParts[1] ) <= 31 && Number( dateParts[1] ) >=1 )

You may add also date if you wish

score 0 · Accepted Answer · edited May 23 '17 at 12:04

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This is a regex that could help you: Javascript date regex DD/MM/YYYY

Please consider converting the string-to-validate into a date-object and see if its valid. This will actually validate it and will not accept dates like 31-02-9999

edited May 23 '17 at 12:04

Community

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answered May 03 '13 at 14:10

Zim84

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Date format Regex

3 Answers3