357704 - events from yesterday/today sometimes suddenly lose 2 hours

Status: RESOLVED DUPLICATE of bug 314339

(Calendar :: Import and Export, defect)

Description

[Matp75]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; fr; rv:1.8.1) Gecko/20061010 Firefox/2.0
Build Identifier: Thunderbird 1.5.0.7(20060909) ligthning (2006100618)

For the second times in two weeks, I've seen events from today (and yesterday) loose 2 hours

Reproducible: Sometimes

Steps to Reproduce:
1. open thunderbird+ lightning
2. accept invitations (emitted by outlook 2003 with exchange), events are created (example : meeting at 9:30 am monday)
2. ...several days (tunderbird sometimes closed, sometimes laptop is in hibernate mode) 
3. wake up on monday
4. read mail, ... look at the agenda 

Actual Results:  
yesterday and today events have lost 2 hours (ie meeting is at 7:30 instead of 9:30 !)
events for other days are not affected (check for original invitation show that there's a difference of two hours)

Expected Results:  
time for a event should not change by itself

My timezone is Europe/Paris (GMT+1 at this time of the year)

Comment 1

[Stefan Sitter [:ssitter]]

This could be the same issue as described in Bug 314339 Comment #6, caused by events with non-native timezones.

Comment 2

[Bas van den Bosch]

Could you please attatch the original ics and the export of the ics in thunderbird (both including the VTIMEZONE-definitions) so we can see what's wrong?

Comment 3

[cmtalbert]

Yes, I believe that is exactly what is happening.  That is the behavior when we lose a timezone definition (the time gets converted to utcbased floating time,
which would have been time-2 hours for events prior to 10/23 (you were still in
DST time, I think).

Marking as a dupe of bug 314339. (Please post ICS files to that bug instead of here).