javascript - Convert date in one timezone to another timezone using timezone abbreviations - Stack Overflow

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I am working on a web application where a user can set his/her timezone in the application which is further used in the application for various date-time conversions. The selected timezone can be different from user's locale timezone.

I am currently stuck on a problem where I need to pare a user selected date(which user assumes to be in the timezone selected by him/her in the application) with the current date to see if the selected date is a date in future. With reference to all the places I have searched, I have found that I can get current date in user locale or UTC time.

So the gist of my problem is - Is there any way to convert a date from one timezone to another using the timezone abbreviations?

I have searched a lot before posting here but could not get any solution. Most of the places that I found during my search suggest that there is no such solution available.

I have tried using date.js but it does not suffice the purpose as it is quite outdated and also the timezone abbreviations supported by it is a very limited set. I have also taken a look a timezoneJS but I don't think that it works with timezone abbreviations.

Is there any way in which it can be acplished using javascript or jquery?

I am working on a web application where a user can set his/her timezone in the application which is further used in the application for various date-time conversions. The selected timezone can be different from user's locale timezone.

I am currently stuck on a problem where I need to pare a user selected date(which user assumes to be in the timezone selected by him/her in the application) with the current date to see if the selected date is a date in future. With reference to all the places I have searched, I have found that I can get current date in user locale or UTC time.

So the gist of my problem is - Is there any way to convert a date from one timezone to another using the timezone abbreviations?

I have searched a lot before posting here but could not get any solution. Most of the places that I found during my search suggest that there is no such solution available.

I have tried using date.js but it does not suffice the purpose as it is quite outdated and also the timezone abbreviations supported by it is a very limited set. I have also taken a look a timezoneJS but I don't think that it works with timezone abbreviations.

Is there any way in which it can be acplished using javascript or jquery?

• javascript
• jquery

Share Improve this question Follow asked Jun 13, 2013 at 10:58 Nisha GoyalNisha Goyal 3733 silver badges1010 bronze badges

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1 Answer 1

Sorted by: Reset to default 3

Here you go:

// calculate local time in a different city given the city's UTC offset
function calcTime(city, offset) {

    // create Date object for current location
    var date = new Date();

    // convert to msec
    // add local time zone offset 
    // get UTC time in msec
    var utc = date.getTime() + (date.getTimezoneOffset() * 60000);

    // create new Date object for different city
    // using supplied offset
    var newDate = new Date(utc + (3600000 * offset));

    // return time as a string
    return "The local time in " + city + " is " + newDate.toLocaleString();
}

// get Bombay time
console.log(calcTime('Bombay', '+5.5'));

// get Singapore time
console.log(calcTime('Singapore', '+8'));

// get London time
console.log(calcTime('London', '+1'));

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