How to Get a User'S Time Zone

Getting the client's time zone (and offset) in JavaScript

Using `getTimezoneOffset()`

You can get the time zone offset in minutes like this:

var offset = new Date().getTimezoneOffset();
console.log(offset);
// if offset equals -60 then the time zone offset is UTC+01

get client time zone from browser

Look at this repository pageloom it is helpful

download jstz.min.js and add a function to your html page

<script language="javascript">
    function getTimezoneName() {
        timezone = jstz.determine()
        return timezone.name();
    }
</script>

and call this function from your display tag

get user timezone

This will get you the timezone as a PHP variable.
I wrote a function using jQuery and PHP. This is tested, and does work!

On the PHP page where you are want to have the timezone as a variable, have this snippet of code somewhere near the top of the page:

    session_start();
    $timezone = $_SESSION['time'];
?>

This will read the session variable "time", which we are now about to create.

On the same page, in the section, first of all you need to include jQuery:

<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js"></script>

Also in the section, paste this jQuery:

<script type="text/javascript">
    $(document).ready(function() {
        if("".length==0){
            var visitortime = new Date();
            var visitortimezone = "GMT " + -visitortime.getTimezoneOffset()/60;
            $.ajax({
                type: "GET",
                url: "http://example.com/timezone.php",
                data: 'time='+ visitortimezone,
                success: function(){
                    location.reload();
                }
            });
        }
    });
</script>

You may or may not have noticed, but you need to change the url to your actual domain.

One last thing. You are probably wondering what the heck timezone.php is. Well, it is simply this:
(create a new file called timezone.php and point to it with the above url)

    session_start();
    $_SESSION['time'] = $_GET['time'];
?>

If this works correctly, it will first load the page, execute the JavaScript, and reload the page. You will then be able to read the $timezone variable and use it to your pleasure! It returns the current UTC/GMT time zone offset (GMT -7) or whatever timezone you are in.

You can read more about this on my blog

How to get time from user with respect to timezone

    String userTimeZone = "Asia/Samarkand";
    String userDate = "2018-07-05";

    ZoneId zone = ZoneId.of(userTimeZone);
    Instant dbInstant = LocalDate.parse(userDate)
            .atStartOfDay(zone)
            .toInstant();

    System.out.println(dbInstant);

This prints what you had expected:

2018-07-04T19:00:00Z

I don’t know MongoDB’s JDBC driver, but I assume it would be happy to accept an Instant and store it in UTC in the database.

GMT+05:00 is not really a time zone, it’s a GMT offset. If your user is in a time zone that uses the same UTC offset always, it would work. But politicians tend to change their minds, so even if that time zone doesn’t use summer time (DST), it may do in a couple of years. And very many time zones already do. Therefore your user should pick a proper time zone like Asia/Tashkent, for example.

Edit: I understand from your comment that MongoDB expects a java.util.Date object. Funny and old-fashioned, but in that case the conversion is straightforward when you know how:

    Date dbDate = Date.from(dbInstant);
    System.out.println(dbDate);

On my computer in Europe/Copenhagen time zone this printed:

Wed Jul 04 21:00:00 CEST 2018

Don’t be fooled: this is the correct time. Date.toString (implicitly called through System.out.println) grabs my JVM’s time zone setting and uses it for generating the string. The Date itself doesn’t have a time zone in it and holds the same point in time as the Instant.

Link: Oracle tutorial: Date Time

How to get user's local timezone other than server timezone(UTC) in python?

Got it.

from datetime import datetime
from pytz import timezone

fmt = "%Y-%m-%d %H:%M:%S"

# Current time in UTC
now_utc = datetime.now(timezone('UTC'))
print now_utc.strftime(fmt)

# Convert to US/Pacific time zone
now_pacific = now_utc.astimezone(timezone('US/Pacific'))
print now_pacific.strftime(fmt)

# Convert to Europe/Berlin time zone
now_berlin = now_pacific.astimezone(timezone('Europe/Berlin'))
print now_berlin.strftime(fmt)

Courtesy: http://www.saltycrane.com/blog/2009/05/converting-time-zones-datetime-objects-python/

Moment.js - how to get user time zone?

Ok I found an answer, all that we need is just get current utcOffset from momentjs library:

const currentUtcOffset = moment().utcOffset()

and pass it to utc method

moment(date).utc(currentUtcOffset).toISOString()

Now everything works perfect.