How should I get GMT time as integer

Question

Would this be correct ?

function getGMT() {
    var currentTime = new Date();
    return currentTime.getTime() + currentTime.getTimezoneOffset()*60*1000;
}

in particular is it correct to add the offset or should it be subtracted ?

Possible duplicate of [How do I get a UTC Timestamp in JavaScript?](http://stackoverflow.com/questions/9756120/how-do-i-get-a-utc-timestamp-in-javascript) — Peyman Mohamadpour, Feb 07 '16 at 02:04
GMT is a time zone and UTC is a time standard (http://www.timeanddate.com/time/gmt-utc-time.html) ... Sorry I cannot understand from the other question how to get GMT as integer without accessing a remote server. — kofifus, Feb 07 '16 at 02:07
`is it correct to add the offset or should it be subtracted` - neither — Jaromanda X, Feb 07 '16 at 02:18

score 1 · Accepted Answer · answered Feb 07 '16 at 02:16

1

Simply:

return currentTime.getTime()

answered Feb 07 '16 at 02:16

Supersharp

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as an example - `console.log(new Date('1970-01-01T00:00:00.000Z').getTime())` will log `0` – Jaromanda X Feb 07 '16 at 02:22
I thought getTime returns current time and not GMT – kofifus Feb 07 '16 at 02:24
@JaromandaX and `console.log(new Date('1970-01-01T01:00:00.000+01:00').getTime())` too. – Supersharp Feb 07 '16 at 02:39
@Supersharp - which proves that time is being stored as a GMT offset – Jaromanda X Feb 07 '16 at 02:47
@kofifus - when in doubt, read some [documentation](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/getTime) ... you could equally use `.valueOf()` instead – Jaromanda X Feb 07 '16 at 02:48

score 0 · Answer 2 · edited Feb 07 '16 at 02:13

0

function getGMT() {
    var currentTime = new Date();
    return currentTime.getTime() + currentTime.getTimezoneOffset()*60*1000;
    document.getElementById("wtf").innerHTML = currentTime.getHours();
}

it will spit out a number between 0-23

maybe i don't understand what you are trying to do

edited Feb 07 '16 at 02:13

Peyman Mohamadpour

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answered Feb 07 '16 at 02:06

Dipz

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I need the number of milliseconds since 1970/01/01 like getTime ... so you're saying adding the offset is the correct way ? – kofifus Feb 07 '16 at 02:10
no it is not correct to add or subtract the timezone offset. Dates are "stored" as milliseconds since 1 jan 1970 0:00:00 GMT – Jaromanda X Feb 07 '16 at 02:24

How should I get GMT time as integer

2 Answers2