[Tickets #10007] Multi-day events split up strangely when exported as ics

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Ticket URL: http://bugs.horde.org/ticket/10007
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  Ticket             | 10007
  Created By         | spamstop1 at terriertech.com
  Summary            | Multi-day events split up strangely when exported as
                     | ics
  Queue              | Kronolith
  Version            | Git master
  Type               | Bug
  State              | Unconfirmed
  Priority           | 2. Medium
  Milestone          |
  Patch              |
  Owners             |
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spamstop1 at terriertech.com (2011-04-29 06:00) wrote:

Multi-day events are split up with overlapping dates when exported as  
ics, particularly when timezone changes.

Here is an event exported from Kronolith 2.2:

BEGIN:VEVENT
DTSTART:20110413T002500Z
DTEND:20110416T022500Z
DTSTAMP:20110427T220529Z
UID:20110306165810.673097ek81pfc0ow at zzz.com
CREATED:20110306T225810Z
LAST-MODIFIED:20110426T231601Z
SUMMARY:Philadelphia
ORGANIZER;CN=Xxx Yyy:mailto:xxx.yyy at zzz.com
DESCRIPTION:
CATEGORIES:
CLASS:PUBLIC
STATUS:CONFIRMED
TRANSP:OPAQUE
END:VEVENT

The following is from the same event exported using 3.0.2-git.  Note  
that the last VEVENT starts at 20110415T140000Z, which overlaps with  
the all-day event before it (depending on which timezone the event is  
viewed in).

Furthermore, the fact that all the events are exported with the same  
UID seems to cause Thunderbird/Lightning to ignore subsequent  
duplicates (i.e. the end result is that it displays only the first of  
the VEVENTs).

BEGIN:VEVENT
DTSTART:20110413T002500Z
DTEND:20110413T135959Z
DTSTAMP:20110429T050117Z
UID:20110306165810.673097ek81pfc0ow at zzz.com
CREATED:20000428T195111Z
LAST-MODIFIED:20000428T195111Z
SUMMARY:Philadelphia
ORGANIZER;CN=xxx:mailto:yyy
DESCRIPTION:
CATEGORIES:
CLASS:PUBLIC
STATUS:CONFIRMED
TRANSP:OPAQUE
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20110414
DTEND;VALUE=DATE:20110414
DTSTAMP:20110429T050117Z
UID:20110306165810.673097ek81pfc0ow at zzz.com
CREATED:20000428T195111Z
LAST-MODIFIED:20000428T195111Z
SUMMARY:Philadelphia
ORGANIZER;CN=xxx:mailto:yyy
DESCRIPTION:
CATEGORIES:
CLASS:PUBLIC
STATUS:CONFIRMED
TRANSP:OPAQUE
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20110415
DTEND;VALUE=DATE:20110415
DTSTAMP:20110429T050117Z
UID:20110306165810.673097ek81pfc0ow at zzz.com
CREATED:20000428T195111Z
LAST-MODIFIED:20000428T195111Z
SUMMARY:Philadelphia
ORGANIZER;CN=xxx:mailto:yyy
DESCRIPTION:
CATEGORIES:
CLASS:PUBLIC
STATUS:CONFIRMED
TRANSP:OPAQUE
END:VEVENT
BEGIN:VEVENT
DTSTART:20110415T140000Z
DTEND:20110416T022500Z
DTSTAMP:20110429T050117Z
UID:20110306165810.673097ek81pfc0ow at zzz.com
CREATED:20000428T195111Z
LAST-MODIFIED:20000428T195111Z
SUMMARY:Philadelphia
ORGANIZER;CN=xxx:mailto:yyy
DESCRIPTION:
CATEGORIES:
CLASS:PUBLIC
STATUS:CONFIRMED
TRANSP:OPAQUE
END:VEVENT