236665 - recurring all day events on the day daylight/summer time ends also appear on next day

Status: RESOLVED WORKSFORME

(Calendar :: General, defect)

Description

[Jan Herold]

User-Agent:       Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.6) Gecko/20040113 MultiZilla/1.6.1.0b
Build Identifier: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.6) Gecko/20040113 MultiZilla/1.6.1.0b

If you add a event at the last day of a month, choosing "This event lasts all
day." and choosing "Repeat every" (and any period of time), then this event also
appears at the first day of the next month.

Reproducible: Always
Steps to Reproduce:
1. go to October 31th 2004.
2. create new event.
3. for example: Title "Halloween"
4. Start: 31.10.2004
5. End: 31.10.2004
6. tab "Recurrence"
7. select checkbox "Repeat every" 1 year
8. confirm with "OK"
Actual Results:  
Event appears at the 10/31/2004, then switch to November -> Event also appears
at 11/01/2004

Expected Results:  
Event only appears at 10/31/2004

Comment 1

[Jussi Kukkonen]

Confirming. Happens in all views.

Comment 2

[gekacheka]

This does not occur for last day of other months.  But does spread to next day
if set to last sunday of october in other years.  Probably problem is because
daylight/summer time ends that day, so end of day is 25 hours after start.

Change title from: 

all day events at the last day of a month with repeating also appear at the
first day of the next month

To:

recurring all day events on the day daylight/summer time ends also appear on
next day

Comment 3

[gekacheka]

*** Bug 248642 has been marked as a duplicate of this bug. ***

Comment 4

[gekacheka]

*** Bug 266267 has been marked as a duplicate of this bug. ***

Comment 5

[Justin Wood (:Callek)]

I do not recall us having any hard-coded DST stuff in our system, if we do can
you please point me to it (as from the research I have done I am nearly certain
that it is incorrect)

Comment 6

[Robin Edrenius]

*** Bug 305130 has been marked as a duplicate of this bug. ***

Comment 7

[Stefan Sitter [:ssitter]]

I can reproduce this error with SB 0.2 (build 20050203), but only if the windows 
setting "Automatically Adjust Clock for Daylight Savings Changes" is enabled. 

With the recent SB 0.2+ (build 20051008) everythink works fine for me.

Comment 8

[Joey Minta]

(In reply to comment #7)
> I can reproduce this error with SB 0.2 (build 20050203), but only if the windows 
> setting "Automatically Adjust Clock for Daylight Savings Changes" is enabled. 
> 
> With the recent SB 0.2+ (build 20051008) everythink works fine for me.

Marking as wfm thanks to Stefan's testing.  If someone is still seeing this on a
recent nightly build they may re-open.