How to convert date time from ISO Format to UTC time zone?
I am using moment.js , and I want to convert from ISO Format date time to UTC time zone.
I can convert from local time to UTC+ISOformat, but I am not able to convert ISO format to UTC time zone.
Input:
2018-03-22T00:00:00Z
Expected output:
date should be in UTC time zone. If I calculate the it should be:
22018-03-21T18:30:00Z
Not able to Converted local date time to ISO then UTC
We can convert into string, But from ISO format can convert or not?
Fox example: I want to convert ISODATE(2018-03-22T00:00:00Z) into UTC time zone.
function toISO(dt) {
return moment(dt).format("YYYY-MM-DDTHH:mm:ss") + "Z";
}
var date = new Date();
var isoDate= toISO(date)
Direct we can convert
function toISOWithUtc(dt) {
return moment(dt).utc().format("YYYY-MM-DDTHH:mm:ss") + "Z";
}
var date = new Date();
toISO(date)
Both 2018-03-22T00:00:00Z and 2018-03-21T18:30:00Z already are in UTC .
Note the Z in the end? This means that the date is in UTC. It's not a hardcoded letter that you can just append to the end - it has a specific meaning, it tells that the date/time is in UTC.
If you want to convert that UTC date to another timezone (I'm guessing that's what you want), you can use moment.tz:
// convert UTC 2018-03-22T00:00:00Z to Asia/Kolkata timezone
moment.tz('2018-03-22T00:00:00Z','Asia/Kolkata')
Just change the timezone name to the one you want to convert.
And calling format() will give you the converted date/time in ISO8601 format:
moment.tz('2018-03-22T00:00:00Z','Asia/Kolkata').format() // 2018-03-22T05:30:00+05:30
Note that the offset changed from Z to +05:30 . This means that the date/time above is 5 hours and 30 minutes ahead UTC, which is the result of converting 2018-03-22T00:00:00Z to Kolkata's timezone.
Note: I think you're mistaking the concepts here.
UTC is a time standard. It defines things like the current date/time accross the world, it uses atomic clocks to make sure everybody on Earth are synchronized, and timezones are all based on offsets from UTC.
ISO8601 is a standard for exchanging date/time-related data. It defines formats (text representations of dates). A date/time can be in ISO format, regardless of being in UTC or not .
That's why "convert from UTC to ISO" (or vice-versa) makes no sense at all.
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