Moment Js Local Timezone

moment().utcOffset(); moment().utcOffset(Number String); moment().utcOffset(Number String, Boolean);

Get or set the UTC offset in minutes.

  1. @basickarl Date objects are both UTC and local at the same time. That is why to make this simpler in moment there is separate utc and local modes, so the function.year can do either, depending on the mode.
  2. By default, moment objects are created in the local time zone. Local time zone - it's a time zone which is set in a browser or on your node.js server. To change the default time zone, use moment.tz.setDefault with a valid time zone.

Note: Unlike moment.fn.zone thisfunction returns the real offset from UTC, not the reverse offset (as returnedby Date.prototype.getTimezoneOffset).

Moment(selectedDate) //convert javascript date to moment moment.setTimezone('+0200') // this should change timezone keeping the date and time unchanged moment.utc.toJSON //back to server The text was updated successfully, but these errors were encountered.

TimezoneMoment Js Local Timezone

Getting the utcOffset of the current object:

Setting the UTC offset by supplying minutes. The offset is set on the moment objectthat utcOffset() is called on. If you are wanting to set the offset globally, try using moment-timezone. Note that once you set an offset,it's fixed and won't change on its own (i.e there are no DST rules). If you wantan actual time zone -- time in a particular location, likeAmerica/Los_Angeles, consider moment-timezone.

If the input is less than 16 and greater than -16, it will interpret your input as hours instead.

Local

It is also possible to set the UTC offset from a string.

moment#utcOffset will search the string for the last match of +00 -00 +00:00 +0000-00:00 -0000 Z, so you can even pass an ISO8601 formatted string with offset and the momentwill be changed to that UTC offset.

Note that if the string does not include 'Z', it must include the + or - character.

The utcOffset function has an optional second parameter which accepts a boolean valueindicating whether to keep the existing time of day.

  • Passing false (the default) will keep the same instant in Universal Time, but the local time will change.

  • Passing true will keep the same local time, but at the expense of choosing a different point in Universal Time.

One use of this feature is if you want to construct a moment with a specific time zoneoffset using only numeric input values:

Moment is a popular JavaScript library for working with dates. Moment makes it easy to add, subtract, and format dates, but, by itself, Moment is limited to working with two timezones: UTC and whatever the JavaScript runtime locale's timezone is. The moment-timezone library provides the core Moment API, plus support for IANA timezones.

Moment Js Current Timezone

Note that you can theoretically format dates in arbitrary timezones with vanilla JavaScript, but the built-in toLocaleString() function's supported timezones are implementation-specific. Which means that you're better off not relying on toLocaleString() supporting timezones in the browser.

Getting Started With moment-timezone

Moment Js Get Current Timezone Offset

Moment-timezone is a separate npm module from moment, but moment-timezone depends on moment under the hood. So you can install moment-timezone by itself, or both moment and moment-timezone.

Once you install moment-timezone, you can require() it in and use it like you would use moment.

The moment-timezone API is, for practical purposes, a superset of the moment API. Virtually anything you can do with moment,you can also do with moment-timezone. For example, date formatting:

However, moment-timezone adds a moment.tz() that you can use to create anew moment object with a custom timezone. For example, here's how you cancreate a moment object representing the current time in Longyearbyen, Norway.

The string 'Arctic/Longyearbyen' is an IANA timezone name.Wikipedia has a full list of IANA timezones.For example, below are 3 more common IANA timezone names:

  • 'America/New_York': US Eastern time
  • 'America/Los_Angeles': US Pacific time
  • 'Europe/London': UK time
Moment Js Local Timezone

Formatting and Loading Dates Using moment.tz()

One of the main reasons to use moment-timezone is to convert existing datesfrom a standardized format to a certain timezone. For example, given aUnix timestamp, you can convertthat timestamp to its corresponding time in London, regardless of yourmachine's local time.

You can convert a Unix timestamp to a nicely formatted string in a giventimezone by passing 2 parameters to moment.tz():

Similarly, you can convert a vanilla JavaScript date into a formattedstring with a given timezone. For example, the below code outputs adate formatted for London time, even though my machine is on New York time.

Moment-timezone also adds a 'z' option to format() which lets you add the abbreviated timezone name. The below codeoutputs the current timezone as 'BST', short for British Summer Time.

Note that 'z' outputs BST, not Europe/London. The IANA timezone Europe/Londonencodes daylight savings time rules. That means, if you pass Europe/London to moment-timezone, the'z' option can output 'GMT' or 'BST' depending on daylight savings.

In general, moment.tz() supports the same parameters as moment(),plus the addition of a timezone parameter. For example, the below codeparses the date string '2020/01/02' with the given format and timezone,giving you a moment object representing midnight on January 2, 2020in London.

Static tz() vs Method tz()

A common cause of confusion is that, in addition to the static moment.tz()function, moment-timezone also adds a tz() method to moment instances.This lets you change the timezone of a moment instance.

In many cases, using the static function moment.tz() and the moment#tz() methodgives you the same result. However, they can give different results when parsingdate strings.

For example, if you parse the string '2020/01/02' and then call the moment#tz()method, you're telling moment to parse the string in the locale time, andthen convert the date to a given IANA timezone.

Moment Js Local Timezone

However, if you call moment.tz() with a given IANA timezone, you're tellingmoment to parse the string in the given IANA timezone, rather than in thelocale time. Notice that the below code shows the current time as exactlymidnight, rather than 21:00 ('America/Los_Angeles' is 3 hours behind New York time).

Because of this difference, you should prefer to use moment.tz() when creatingnew moment-timezone objects, rather than changing the timezone after creationusing the moment#tz() method.

When Timezones Matter

Timezones often pop up when building apps where you have objects with animplicit location. For example, if you're building a blog, and a user postsa comment at 5pm in London, it is arguably correct to show a user lookingat the comment in New York that the comment was posted at 12pm.

But suppose you're building an events platform. If an event is happeningat 5pm in London and that event isn't being streamed online, a user inNew York should still see 5pm. If the expectation is that, if you areparticipating in the event, you will be in London, then showing Londontime regardless of the user's current location is the correct behavior.

Moment Js Local Time Zone Chart

Moving On

Moment Js Set Current Timezone

Moment-timezone is a great library for handling times in different timezones. Acronis true image 2020 download. Given a Unix timestamp or a date string, you can convert it to afully fledged moment object in any IANA timezone. No need to worry about daylight savings time.