1861804 - Calendar view off by one hour on DST boundary

Status: RESOLVED DUPLICATE of bug 1797693

(Calendar :: Calendar Frontend, defect)

Description

[geez]

Steps to reproduce:

• Have a calendar, either local or CalDAV (tested both)
• Be on DST/summer time (currently Sat Oct 28, CEST)
• Create event for the future outside of DST (e.g. tomorrow, Sun Oct 29, at 15:00-16:00), either click/drag or "New event".

Actual results:

• Event appears one hour later than created originally (shown at 16:00-17:00), in week view.
• Mouseover still shows 15:00-16:00

Expected results:

Event should be shown at the correct time.

Comment 1

[geez]

Notice that Nextcloud's calendar does show the event at the expected time, as do the mouseover and event settings dialog in Thunderbird.

I am quite certain this is view related, because for the week after (that is entirely without DST), events show up at their expected time. This occurs in the week view and the day view.

Comment 2

[geez]

Thunderbird 115.3.1 (Ubuntu deb)

Comment 3

[till]

Attachment: Screenshot from 2023-10-29 11-40-54.png

event is one hour too late in the view, tooltip and event data is correct though, events after 2023-10-29 look as expected