In Javascript, how can I convert date/time in GMT to EST irrespective of user settings?
var tmpDate = New Date("enter any valid Date format here")
The javascript Date() function will automatically convert it to your local time.
Example:
var tmpDate = new Date("Fri Jul 21 02:00:00 GMT 2012");
alert(tmpDate);
//Result: Fri Jul 20 22:00:00 EDT 2012
Try some different values at jsfiddle: http://jsfiddle.net/R3huD/
i was surprise to find the simplest solution.
If you have date in GMT, and when you create date in browser it always create in that time zone.
Simplest way is create date object with GMT itself and then do below
starTime.setHours(starTime.getHours()+(starTime.getTimezoneOffset()/60));
That's it. Even if you have date of future after day light saving like after November then also it will also work.
See here:
https://web.archive.org/web/1/http://articles.techrepublic%2ecom%2ecom/5100-10878_11-6016329.html
all you have to do is get the time in miliseconds and then add the offset in milliseconds and then shift back to a date time object
Related
I have a situation where I am always returned the date from the server as a UK date time string.
E.g. '2020-07-19 16:40:00'
This would be 4:40PM in UK at +01:00, or 3:40PM UTC.
I want to be able to convert this time from GMT to the local time on the computer;
If I do this when in the UK...
var date = new Date('2020-06-19 16:40:00 GMT');
it returns Fri Jun 19 2020 17:40:00 GMT+0100 (British Summer Time)
Which is an hour out.
If I do the date in winter time (without daylight savings), this is correct.
var date = new Date('2020-01-19 16:40:00 GMT');
returns Sun Jan 19 2020 16:40:00 GMT+0000 (Greenwich Mean Time)
Is there a way I can correctly adjust this to always give the correct time regardless of what timezone the computer is set in, based on UK clock times.
Thanks in advance
As I understand your question, you don't know if the timestamp from the server is GMT or BST as the offset isn't included. You can work it out using plain JS but it's somewhat kludgy and error prone, see Calculate Timezone offset only for one particular timezone.
It would be much better to get the server to use an ISO 8601 format supported by ECMAScript and either send the offset or always use UTC/GMT.
If that isn't an option, you can use a library like Luxon to specify the location (and hence offset rules) to use for parsing, e.g.
let DateTime = luxon.DateTime;
['2020-07-19 16:40:00', // BST +1
'2020-01-19 16:40:00' // GMT +0
].forEach(ts => console.log(
DateTime.fromFormat(ts, 'yyyy-LL-dd HH:mm:ss', {zone: 'Europe/London'}))
);
<script src="https://cdn.jsdelivr.net/npm/luxon#1.24.1/build/global/luxon.min.js"></script>
PS Don't forget to always tell the parser the format to parse.
When I try to create a date object from another date format, the result date is changing it's value. How to achieve this without changing the date value ?
new Date("Mon, 31 Oct 2016 00:00:00 GMT");
the result coming as Sun Oct 30 2016 20:00:00 GMT-0400 (Eastern Daylight Time), How can I get the Monday 31 date from the above?
Adjusting the timezoneOffset from the created date object should do the trick,
but be cautious while using it , as you should be sure that the date object was created from GMT not from some local time .
And the below answer has been posted assuming the input date was in GMT
var tempDate = new Date("Mon, 31 Oct 2016 00:00:00 GMT");
var tempTime = tempDate.getTime() + (tempDate.getTimezoneOffset() * 60000);
tempDate = new Date(tempTime);
console.log(tempDate);
It doesn't change the date, it just converts it to your local timezone. This is a bit of annoying behaviour and the only way I know to get around it is to set your system timezone to GMT. If you need to do date and time work, you might want to look at Moment.js - http://momentjs.com/
In my javascript i want to convert date from date string.
i have string like
date = "Thu Sep 03 2015 19:30:00 GMT+0000"
Now i convert string using Date object.
var d = new Date(date);
But this gives me,
Fri Sep 04 2015 01:00:00 GMT+0530 (IST)
It automatically add one day into day. What is wrong?
It automatically add one day into day. What is wrong?
Nothing. The time you input is 19:30 GMT and the timezone on the device you're using is set to GMT+0530. Add 5 hours 30 minutes to 7:30pm and you get 01:00am the following day.
You should not use the Date constructor to parse strings, as it is inconsistent across browsers and until recently, entirely implementation dependent. Manually parse strings, or use a Date library.
Am getting a GMT time from my server in this format
Fri, 18 Oct 2013 11:38:23 GMT
My requirement is to convert this time to local time using Javascript, eg:/ if the user is from India, first i need to take the time zone +5.30 and add that to my servertime and convert the time string to the following format
2013-10-18 16:37:06
I tried with following code but not working
var date = new Date('Fri, 18 Oct 2013 11:38:23 GMT');
date.toString();
Please help me to solve this issue, Thanks in advance
This worked for me:
<script>
var strDateTime = "Fri, 18 Oct 2013 11:38:23 GMT";
var myDate = new Date(strDateTime);
alert(myDate.toLocaleString());
</script>
Please take a look at http://www.w3schools.com/jsref/jsref_obj_date.asp for all further date time manipulations, from the date object myDate.
Why is it that in javascript I create a new date object mydate = new Date('2011-10-03'); and it prints as October 2nd? Sun Oct 02 2011 18:00:00 GMT-0600 (MDT)
If I set the date to be October 3rd shoudn't I get a 3 when I call mydate.getDate();?
What I am I missing?
I believe your date is off by one because it's being parsed in UTC time and you're displaying it in mountain time (I assume your local time). This is per ECMA spec.
See section 15.9.3.3 of the Javascript specification here:
http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf
Try this instead
mydate = new Date('2011/10/03');
I think it is setting the date to 2011-10-03 and the time to 00:00:01 for UTC.
And the print is converting that date object to your local time