CODEWITHSUNDEEP
javascript
Natalka
Natalka

Reputation: 438

How do I obtain the windows time zone string from Javascript or jQuery?

I have a dropdown list of timezones based of of .NET method System.TimeZoneInfo.GetSystemTimeZones provided from my MVC controller. What I would like to do is capture the user's timezone (client side) and default the dropdown list to their timezone.

On both Chrome and Firefox when I type in new Date() to the console I can get a string like Fri Jan 24 2020 08:50:02 GMT-0500 (Eastern Standard Time)

Other than parsing between the parentheses, is there a way to get the timezone string Eastern Standard Time?

Upvotes: 1

Views: 2283

Answers (4)

Felix Lemke
Felix Lemke

Reputation: 6488

You can get the current timezone offset in minutes from the dates getTimezoneOffset function. Then you can divide the number by 60 to get the actual offset in hours. Note that the offset is the additatively inverted number of the "GMT+0100" string.

const offset = new Date().getTimezoneOffset() / 60;
console.log('Offset: ', offset);
console.log('UTC:    ', new Date().toUTCString());
console.log('GMT:    ', new Date().toString());

See the docs:

The getTimezoneOffset() method returns the time zone difference, in minutes, from current locale (host system settings) to UTC.

Upvotes: 1

Ling Vu
Ling Vu

Reputation: 5181

I can suggest to use Moment, which is a third party library for handling everything from time to dates. I really really recommend this.

Official Moment documentation: https://momentjs.com/

In your question you can get the time zone really easy using moment like:

var jun = moment("2014-06-01T12:00:00Z");
var dec = moment("2014-12-01T12:00:00Z");

jun.tz('America/Los_Angeles').format('z');  // PDT
dec.tz('America/Los_Angeles').format('z');  // PST

jun.tz('America/New_York').format('z');     // EDT
dec.tz('America/New_York').format('z');     // EST

// This gets you your current timezone
moment().tz(Intl.DateTimeFormat().resolvedOptions().timeZone).format('z')

// Other examples
jun.tz('Asia/Tokyo').format('ha z');           // 9pm JST
dec.tz('Asia/Tokyo').format('ha z');           // 9pm JST

jun.tz('Australia/Sydney').format('ha z');     // 10pm EST
dec.tz('Australia/Sydney').format('ha z');     // 11pm EST

Upvotes: 1

pliniocf
pliniocf

Reputation: 374

I used this to get the gmt text. It is rought, but might work

new Date().toString().split('(')[1].split(')')[0]

Upvotes: 6

Ashkan Pourghasem
Ashkan Pourghasem

Reputation: 748

How about this?

Intl.DateTimeFormat().resolvedOptions().timeZone

Upvotes: 3

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