1204003 - Invite from Lotus Notes creates event in Lightning 1 hr late

Status: RESOLVED DUPLICATE of bug 1304127

(Calendar :: Internal Components, defect)

Description

[Michael Fort]

User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0
Build ID: 20150826023504

Steps to reproduce:

Send invite from Lotus Notes (X-Mailer: Lotus Notes Release 8.5.3FP6) to Tbird 38.2.0 & Lightning 4.0.2 on m/c running Win 10  for meeting at 15:00.

Text of .ics file received is as follows:

"BEGIN:VCALENDAR X-LOTUS-CHARSET:UTF-8 VERSION:2.0 PRODID:-//Lotus Development Corporation//NONSGML Notes 8.5.3//EN_S METHOD:REQUEST BEGIN:VTIMEZONE TZID:GMT BEGIN:STANDARD DTSTART:19501029T020000 TZOFFSETFROM:+0100 TZOFFSETTO:+0000 RRULE:FREQ=YEARLY;BYMINUTE=0;BYHOUR=2;BYDAY=-1SU;BYMONTH=10 END:STANDARD BEGIN:DAYLIGHT DTSTART:19500326T020000 TZOFFSETFROM:+0000 TZOFFSETTO:+0100 RRULE:FREQ=YEARLY;BYMINUTE=0;BYHOUR=2;BYDAY=-1SU;BYMONTH=3 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID="GMT":20150909T150000 DTEND;TZID="GMT":20150909T153000 TRANSP:OPAQUE DTSTAMP:20150903T150816Z SEQUENCE:0 ATTENDEE;ROLE=CHAIR;PARTSTAT=ACCEPTED;CN="

For comparison, this arrived a few weeks ago and started at the right time (ie 15:00):

"BEGIN:VCALENDAR X-LOTUS-CHARSET:UTF-8 VERSION:2.0 PRODID:-//Lotus Development Corporation//NONSGML Notes 8.5.3//EN_C METHOD:REQUEST BEGIN:VTIMEZONE TZID:GMT BEGIN:STANDARD DTSTART:19501029T020000 TZOFFSETFROM:+0100 TZOFFSETTO:+0000 RRULE:FREQ=YEARLY;BYMINUTE=0;BYHOUR=2;BYDAY=-1SU;BYMONTH=10 END:STANDARD BEGIN:DAYLIGHT DTSTART:19500326T020000 TZOFFSETFROM:+0000 TZOFFSETTO:+0100 RRULE:FREQ=YEARLY;BYMINUTE=0;BYHOUR=2;BYDAY=-1SU;BYMONTH=3 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID="GMT":20150722T150000 DTEND;TZID="GMT":20150722T153000 TRANSP:OPAQUE DTSTAMP:20150721T125212Z SEQUENCE:0 ATTACH:CID:1__=0FBBF41ADFD66BC08f9e8a93df938690918c0FB@ ATTENDEE;ROLE=CHAIR;PARTSTAT=ACCEPTED;CN=" 

Message sent from notes client running UK time to Tbird client running UK time.
Have checked date (using Date() in Error console). UTC offset is correct.
I am not using Google calendar.
I have sent a trial invite to Outlook client & Tbird client, and Outlook client created event at the right time.

i have raised this on Tbird community under "invitation from Lotus shows wrong time" and been advised by Toad Hall to log it here


Actual results:

Event created at 16:00 instead of 15:00


Expected results:

Event should have been created at 15:00.

Comment 1

[Stefan Sitter [:ssitter]]

I assume the problem could be the following: 
GMT (Greenwich Mean Time) is defined to always be UTC+0. But in your example GMT is used as a timezone identifier to describes a timezone that switches between UTC+0 and UTC+1. Like in UK the clock changes between GMT (UTC+0) and BST (British Summer Time, UTC+1). The well known GMT name and the custom GMT timezone identifier probably interfere with each other.

Comment 2

[Michael Fort]

Attachment: Examples of iCal files & events created from them