Wrong timezone when importing invitation ics from Lotus Notes

Question

Dear all,
I have the problem that the timezone is not correctly detected when importing invitations from  Lotus Notes (PRODID:-//Lotus Development Corporation//NONSGML Notes 8.5.2//EN_C) The event is one hour too late, I cal thinks it is "standard time" and not "daylight saving time"
This is the Timezone difinition in the ics file:
BEGIN:VTIMEZONE
TZID:W. Europe
BEGIN:STANDARD
DTSTART:19501029T020000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RRULE:FREQ=YEARLY;BYMINUTE=0;BYHOUR=2;BYDAY=-1SU;BYMONTH=10
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:19500326T020000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RRULE:FREQ=YEARLY;BYMINUTE=0;BYHOUR=2;BYDAY=-1SU;BYMONTH=3
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
When I change it to this definition:
BEGIN:VTIMEZONE
TZID:W. Europe
BEGIN:STANDARD
DTSTART:16010101T030000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=10
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:16010101T020000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=3
END:DAYLIGHT
END:VTIMEZONE
the event is correctly scheduled. Now the timezone is daylight saving time. Any hints on what is going wrong?
Thanks for your help!

Answer 1

My suggestion is to open a bug report with Apple if you can demonstrate that this always occurs. And, provide sample file (as you have above). https://bugreport.apple.com
As a work around I have let my customers know that the Calendar app in iOS appears to work fine and to attempt to accept event invitations through that rather than through Calendar app in OS X.
I also hope to create a simple script, droplet or automator workflow that could filter the timezones into Apple Calendar app friendly names. But, so much to do...