Fix an issue with events spanning DST change off by one hour

Fix an issue with events spanning DST change off by one hour

   KB 21917        Last updated on 07/11/2015  




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Purpose

Fix an issue with events spanning DST change off by one hour. Appointment that does not represent daylight savings (event_wrong_time.ics) which is set to Etc/GMT with not daylight saving setting configured.

BEGIN:VCALENDAR
PRODID:Zimbra-Calendar-Provider
VERSION:2.0
METHODUBLISH
BEGIN:VTIMEZONE
TZID:Etc/GMT
BEGIN:STANDARD
DTSTART:16010101T000000
TZOFFSETTO:-0000
TZOFFSETFROM:-0000
TZNAME:GMT
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT

Appointment that adjusts to Daylight savings <event_correct_time.ics> is set to America/New_York and there it contains TZOFFSET and daylight savings configuration, which is shown in bleu

BEGIN:VCALENDAR
PRODID:Zimbra-Calendar-Provider
VERSION:2.0
METHODUBLISH
BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:STANDARD
DTSTART:16010101T020000
TZOFFSETTO:-0500
TZOFFSETFROM:-0400
RRULE:FREQ=YEARLY;WKST=MO;INTERVAL=1;BYMONTH=11;BYDAY=1SU
TZNAME:EST
END:STANDARD
BEGINAYLIGHT
DTSTART:16010101T020000
TZOFFSETTO:-0400
TZOFFSETFROM:-0500
RRULE:FREQ=YEARLY;WKST=MO;INTERVAL=1;BYMONTH=3;BYDAY=2SU
TZNAME:EDT
ENDAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT

Resolution

For why this appointment was set to GMT, the configuration is set by the client. If the user created the appointment using the advanced client, the timezone is taken from the OS. The organizer is able to update the timezone by first configuring the client to provide this right. They can do this by selecting Preferences, Calendar and enabling Show time zone for the start and end time when creating an appointment under Creating Appointment.

Once this has been configured, they will need to edit the appointment and update the start and end timezone.

Additional Content

  • No related content.


Verified Against: Zimbra Collaboration 8.6, 8.5, 8.0 Date Created: 05/05/2015
Article ID: https://wiki.zimbra.com/index.php?title=Fix_an_issue_with_events_spanning_DST_change_off_by_one_hour Date Modified: 07/11/2015



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Wiki/KB reviewed by SME1 SME2 Copyeditor Last edit by Jorge de la Cruz
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