Javascript - Convert GMT to IST (India Standard Time) using javascript

datejavascriptpsttimezoneutc

I have a date format is GMT or UTC.

var mydate  = '2020-01-14T17:43:37.000Z'

I want to convert this date in IST format so according to this date the output I need in this format.

var date = '2020-Jan-15 12:45'

Best Solution

You can specify an IANA time zone identifier in the options passed to toLocaleString. The identifier for India is Asia/Kolkata.

var s = new Date('2020-01-14T17:43:37.000Z').toLocaleString(undefined, {timeZone: 'Asia/Kolkata'});

This will do the correct time zone conversion, as the input is in UTC (as specified by the Z at the end).

undefined means to use the user's locale for the formatting of the date and time. This is usually what you want. If you want a more particular format (like what you specified in your question), you can provide a specific locale string and/or adjust the other options for toLocaleString, as given in the docs.

Also, note that the conversion in your question is incorrect. India is 5 hours an 30 minutes offset from UTC. Thus the correct output is 2020-01-14 23:13:37 (in whatever format you like)

Related Solutions

C# - Convert UTC/GMT time to local time

For strings such as 2012-09-19 01:27:30.000, DateTime.Parse cannot tell what time zone the date and time are from.

DateTime has a Kind property, which can have one of three time zone options:

Unspecified
Local
Utc

NOTE If you are wishing to represent a date/time other than UTC or your local time zone, then you should use DateTimeOffset.

So for the code in your question:

DateTime convertedDate = DateTime.Parse(dateStr);
var kind = convertedDate.Kind; // will equal DateTimeKind.Unspecified

You say you know what kind it is, so tell it.

DateTime convertedDate = DateTime.SpecifyKind(
    DateTime.Parse(dateStr),
    DateTimeKind.Utc);
var kind = convertedDate.Kind; // will equal DateTimeKind.Utc

Now, once the system knows its in UTC time, you can just call ToLocalTime:

DateTime dt = convertedDate.ToLocalTime();

This will give you the result you require.

Javascript - How to convert a string to boolean in JavaScript

Do:

var isTrueSet = (myValue === 'true');

using the identity operator (===), which doesn't make any implicit type conversions when the compared variables have different types.

Don't:

You should probably be cautious about using these two methods for your specific needs:

var myBool = Boolean("false");  // == true
var myBool = !!"false";  // == true

Any string which isn't the empty string will evaluate to true by using them. Although they're the cleanest methods I can think of concerning to boolean conversion, I think they're not what you're looking for.

Best Solution

Related Solutions

C# - Convert UTC/GMT time to local time

Javascript - How to convert a string to boolean in JavaScript

Do:

Don't:

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