Closed Bug 1710907 Opened 4 years ago Closed 3 years ago

Changing a calender event from all day uses wrong time zone with Google calendar

Categories

(Calendar :: Calendar Frontend, defect)

Product:
Calendar
Component:
Calendar Frontend
Version:
Thunderbird 78
Type:
defect

Tracking

(thunderbird_esr91 affected, thunderbird97 affected, thunderbird98 affected)

Status:
RESOLVED WORKSFORME
Tracking Flags:
Tracking Status
thunderbird_esr91 --- affected
thunderbird97 --- affected
thunderbird98 --- affected

People

(Reporter: bugzilla, Unassigned)

References

Details

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:88.0) Gecko/20100101 Firefox/88.0

Steps to reproduce:

  1. Create a new calendar event. I tested using Google calendar.
  2. Set it to "All day event".
  3. Save it.
  4. In the main calendar view, double click on it to edit it again.
  5. Uncheck "All day event".
  6. Notice that the time zones shown for the start and end times are the local time zones.
  7. Save it without changing the time zones.
  8. In the main calendar view, double click on it to edit it again.
  9. Notice that the time zones shown are now UTC, which is not what was selected.

Actual results:

The start and end time zones are set to UTC, not the local time zone.

Expected results:

The local time zone should have been used.

Alistair, can you still re-produce the issue with a Thunderbird 91 release version or a recent Thunderbird beta/daily?

Flags: needinfo?(bugzilla)

Yes, this still happens on Thunderbird 91.1.2 on Ubuntu 21.10.

Flags: needinfo?(bugzilla)
Summary: Changing a calender event from all day uses wrong time zone → Changing a calender event from all day uses wrong time zone with Google calendar
Status: UNCONFIRMED → NEW
Ever confirmed: true

I observe the same issue in Thunderbird v91.5.0 and beta v97.0b3 using Windows.
I was going to file a bug showing the following steps to reproduce:

Note: My computer and calendar are configured for USA Pacific time zone (America/Los Angeles).
(1) Add an existing Google Calendar to Thunderbird using CalDAV URL such as
https://apidata.googleusercontent.com/caldav/v2/xxxxxxxxxxxx@group.calendar.google.com/events
(2) Create and save an all-day event
(3) Edit the event: disable all-day setting and specify a start time.
(4) Observe: The saved event time doesn't match what was specified. (Maybe saved as UTC time.)

Bug still exists. Also happens to me. Changing from all day to 12:00 displays 14:00 (UTC +2).
I already missed an important appointment because of the wrong time.

Is this also seen in version 102?

Flags: needinfo?(bugzilla)

102.3.1 appears to work correctly. In step 9, the time zone is the local time zone.

Flags: needinfo?(bugzilla)

Resolving as WORKSFORME per comment#8.

Status: NEW → RESOLVED
Closed: 3 years ago
Resolution: --- → WORKSFORME
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