Where the information for userTimezone.id comes from?

[Ihor Stefurak‏]

I'm working on a Gmail Add-on and accessing userTimezone.id using this code, and it's working:

function onHomePage(e) {

 var userTimeZoneId = e.userTimezone.id;

 Logger.log(userTimeZoneId);

}

The problem is when I go to Google Calendar and change my timezone, the function shows the same information. Is it cached somewhere? Where the information comes from?

[Alan Wells‏]

The calendar time zone is independent from the script project time zone.

Also, a Google Sheet can have it's own time zone.

A Google Form doesn't have a setting for it's own time zone.

So, change the time zone in your Apps Script project, and see if that does something.

File -> Project properties -> Time Zone

[Ihor Stefurak‏]

As I'm working on the public add-on I would like to access the user's time zone not the script's one.

Anyway, I opened the settings you suggest and noticed a different timezone from what was printed by my log's.

The script's timezone can be accessed by Session.getScriptTimeZone().

Here is what I see in logs: the result from Session.getScriptTimeZone() is at the top, the result from e.userTimezone.id — at the bottom.

[Alan Wells‏]

Try changing the time zone on your computers operating system.

I know that if the time zone in the computers operating system is changed,

that changes the browser time zone.

Other than that, I don't have any other guesses of how to change the time zone returned by:

e.userTimezone

If you change the time zone on your computers operating system,

you may eventually be detected as a potential security risk.

Regardless of whether you are or not.

I'm assuming that you want to do testing for different time zones for your add-on.

[Andrew Roberts‏]

Personally, I use the user's calendar to get their timezone -

https://developers.google.com/apps-script/reference/calendar/calendar#gettimezone.

Although this will require extra scopes.

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[Andrew Roberts‏]

Take a look at getCalendarDateTime() in this library  (ID: 1X2qbPZljrYN_TrvWkwW8OAn6zQgN7Gu5o1D4OBq522FVaCskiyZe44Au), which may be useful.

[Ihor Stefurak‏]

Thanks for helping me figure this out AJ! Changing my computer's timezone helped. Now I'm sure it's working properly.

Andrew, thanks for the option. I won't request another restricted scope just to get timezone.

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