Closed Bug 1158733 Opened 8 years ago Closed 2 years ago

Detect system timezone from Javascript Internationalization API


(Calendar :: Internal Components, defect, P2)



(thunderbird_esr91 wontfix, thunderbird93 wontfix)

94 Branch
Tracking Status
thunderbird_esr91 --- wontfix
thunderbird93 --- wontfix


(Reporter: Fallen, Assigned: mschroeder)




(1 file)

With the Intl API its possible to get the system timezone in one line of code. This would mean we can get rid of the whole guessSystemTimezone. Here is how:


Requires bug 895737 and maybe bug 837961 fixed.
Whiteboard: [timezone]
What is guessSystemTimezone? I can't find in the source.

Is there a chance that this is already fixed?
Flags: needinfo?(philipp)
Zibi, here is the function "guessSystemTimezone" in Lightning:
Yes, it does seem Intl.DateTimeFormat().resolvedOptions().timeZone gives the most current timezone, this bug could probably be fixed in Lightning now.

Of course having a way to detect if the timezone changes would be favorable, I'm not sure if that is possible yet.
Flags: needinfo?(philipp)
Keywords: good-first-bug
I'm using TB 52.5 under Windows 10 and the timezone is still not automatically changed using the system timezone. Do you plan to implement it shortly?
This is still blocked by bug 895737 (effectively by bug 1343826; I just checked, a runtime change of the system timezone is still not detected). That said, once that is fixed, we're happy to consider this bug for the then upcoming esr version.

Hi, Can I work on this? I am new.

Blocks: 1609219
Priority: -- → P2
Depends on: 1343826
Assignee: nobody → mschroeder
Blocks: 1606357

Removing the dependency on bug 1343826 to move the topic "system timezone change" to bug 1606357.

No longer depends on: 1343826, 895737
Blocks: 918336
Whiteboard: [timezone]

Very nice indeed, thx Martin!

Target Milestone: --- → 94 Branch

Pushed by
Detect system default timezone from JavaScript Internationalization API. r=darktrojan

Closed: 2 years ago
Resolution: --- → FIXED
No longer blocks: 1609219
Regressions: 1734504
No longer regressions: 1734504

As Bug 1684021 appears to have messed up the Brazilian timezones DST again, would uplift of this to ESR be a suitable fix?

(In reply to Matt from comment #13)

As Bug 1684021 appears to have messed up the Brazilian timezones DST again, would uplift of this to ESR be a suitable fix?

This is only relevant for determining the system timezone at first start or when no timezone has been set in Thunderbird preferences for calendar. So, this is not a fix for the problem you described.

Regressions: 1760805
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