1732504 - Duplicated day enumeration displayed in month view (29 Sept 1989 shown twice, 1st Oct 1989 missing)

Status: RESOLVED DUPLICATE of bug 1673835

(Calendar :: Calendar Frontend, defect, P2)

Description

[Roger]

Attachment: thunderbird-calendar-error-2021-09-25.jpg

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:92.0) Gecko/20100101 Firefox/92.0

Steps to reproduce:

To-day Thunderbird 91.1.1 installed itself over Thunderbird 78.14.

Actual results:

I thought the annoying bug "Duplicated day enumeration displayed in month view" doesn't exist any more.
The bug is still here (see attachment showing 1 example).

Expected results:

Correct dates are expected.

Thank you for your work.

(PS. After donation, remove the blue screen 'we need donations' and warn us later if new donations are needed)

Comment 1

[Thomas D. (:thomas8)]

Thanks Roger! Confirming exactly as described on TB 91.1.1 (64-bit), Win10.
Imho we should fix this asap. Wrong dates are the cardinal sin of a calendar. Strangely, this isn't seen in Calendar pane, but only in certain views.
Roger, any other dates that come out wrong?

STR

1. Show Calendar tab
2. From Calendar Pane, choose September 1989
3. In Multiweek or Month View, look at 29 Sept 1989 and following days

Actual result

• 29 Sept 1989 is listed twice
• 1st Oct 1989 is missing
• problem seen irrespective of whether Week starts on Sunday or Monday

Expected result

• Show 29 Sept 1989 only once
• Don't skip 1st Oct

Comment 2

[Martin Schröder [:mschroeder]]

Sounds like a duplicate of bug 1673835 which is already fixed in beta (93) and will probably be fixed in esr (91) soon.

Comment 3

[Geoff Lankow (:darktrojan)]

Sure does.