CODEWITHSUNDEEP
javascriptdate
Peter Ajtai
Peter Ajtai

Reputation: 57695

Why does new Date with a string that has dashes and a leading zeron in the month return what it does?

Why does, 

new Date('2014-04-16')

create a date object (note Apr 15, and 17:00):

Tue Apr 15 2014 17:00:00 GMT-0700 (PDT)

While

new Date('2014-4-16')
Wed Apr 16 2014 00:00:00 GMT-0700 (PDT)

and

new Date('2014/04/16')
Wed Apr 16 2014 00:00:00 GMT-0700 (PDT)

http://jsfiddle.net/pajtai/5LrGX/

Noticed this in Chrome.

Is this something to do with ISO date formatting?

Upvotes: 0

Views: 96

Answers (1)

Ruan Mendes
Ruan Mendes

Reputation: 92304

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date

The constructor allows the following for a string argument

dateString

String value representing a date. The string should be in a format recognized by the >Date.parse() method (IETF-compliant RFC 2822 timestamps and also a version of ISO8601).

So if it's not one of those formats, you shouldn't rely on it. Both of the formats mentioned have two digits for month and day and use dashes, not slashes

You'll notice that Firefox and IE do not allow your month without 2 digits

// Firefox and IE
new Date('2014-4-16').toString()
> 'Invalid Date'

Upvotes: 1

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