458566 - Sydney/Australia timezone is incorrect

Status: RESOLVED INCOMPLETE

(Calendar :: General, defect)

Description

[mark-edwards]

User-Agent:       Mozilla/5.0 (X11; U; SunOS i86pc; en-US; rv:1.8.1.12) Gecko/20080310 Firefox/2.0.0.12
Build Identifier: 2008091804

Late last year NSW changed the date when daylight savings starts. When accessing a networked calendar, lightning incorrectly creates and displays events 1 hour late.  This is rectified for events after the 26th-Oct when daylight savings used to change.
I have verified that the bug exists in Solaris - intel & Sparc, and windows versions of lightning, and that it is not an operating system DST issue.
I used the Sun Java calendar server as the network calendar, and verified it's correct operation with a web based and windows based client.

Reproducible: Always

Steps to Reproduce:
1.Use a networked calendar server
2.Create reccurring appointment from 4th-oct-08 to 27-oct-08
3. Note that after the 5th the time is indicated 1 hour later and that on the 26th the date is again correct.
4.Verify that using another calendar client does not exhibit the same problem.

Actual Results:  
The recurring event will display as 1 hour later between the 5th and the 25th. 

Expected Results:  
The recurring event should display at the same time.

Verified from several machines - both Solaris, Opensolaris and XP.
Lighting misinterprets and incorrectly stores meeting requests during this period, while erroneously creating new entries. This results in the calendar being unreliable - unless you know the origin of the appointment you can't verify it's correct start time.

Comment 1

[Stefan Sitter [:ssitter]]

Do you use Sunbird or Thunderbird+Lightning and what versions?

I just checked in Sunbird 0.9 (20080917) on Windows XP and it creates the following timezone (export event to iCalendar format and check with text editor):

	BEGIN:VTIMEZONE
	TZID:Australia/Sydney
	X-LIC-LOCATION:Australia/Sydney
	BEGIN:STANDARD
	TZOFFSETFROM:+1100
	TZOFFSETTO:+1000
	TZNAME:EST
	DTSTART:19700405T030000
	RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=1SU;BYMONTH=4
	END:STANDARD
	BEGIN:DAYLIGHT
	TZOFFSETFROM:+1000
	TZOFFSETTO:+1100
	TZNAME:EST
	DTSTART:19701004T020000
	RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=1SU;BYMONTH=10
	END:DAYLIGHT
	END:VTIMEZONE

Daylight saving time starts on first Sunday in October and ends on first Sunday in April. This seems correct when compared with <http://www.timeanddate.com/worldclock/clockchange.html?n=240>.

Doesn't look like a Sunbird/Lightning issue. Maybe the Sun Java calendar server messes up the timezones. Or maybe you system uses an outdated timezone information and reports wrong system times to Sunbird/Lightning.

Comment 2

[Martin Schröder [:mschroeder]]

No response from reporter. Feel free to reopen if the problem still exists. -> Resolving INCOMPLETE