Data gets wrong when converting to Date in Javascript

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Hello, I have an API in . net that returns the data, the date comes in format: 2016-06-17T00:00:00 and I try to convert it to date in Javascript, so I do the following:

 var data = new Date(2016-06-17T00:00:00);

It works, but the date is different in the variable, it always changes the day. What I would have to do for the conversion to occur normally?

It does not always happen, for example in the case below occurs: API date: 2015-07-25T00:00:00

var data = new Date('2015-07-25T00:00:00');

The date is as follows: Fri Jul 24 2015 21:00:00 GMT-0300 (Official Time in Brazil), the day is amended.

But in the next example it does not occur: Date of API: 2016-06-24T09:23:53 After converting using the same code the date is the same: Fri Jun 24 2016 06:23:53 GMT-0300 (Brazil’s official time)

javascript html5 angular

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Hello,

That’s right, js considers that the string you are passing as a parameter is in UTC format (because it does not have the time zone in the string), so when it converts to Date it considers its time zone, in the GMT-3 case so it subtracts 3 hours from the string time.

One way to avoid this would be to have your API return the time zone in the string, something like this: '2015-07-25T00:00:00-0300'

  • 1

    It is important to say that the time zone is NOT a constant, javascript takes the user’s browser time zone, so the time zone varies from region and period of the year. For example, here my time zone is in GMT-3 (Brasília Standard Time), but when the daylight saving time will be GMT-2 (Brasilia Daylight Saving Time). Therefore, the solution new Date('2015-07-25T00:00:00-0300') will fail when (or if) the Browser Time Zone changes. To resolve, the date can be saved in GMT+0 in the database, or saved along with your time zone to use it when instantiating Date.

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