[Koha-bugs] [Bug 18563] Force koha.ics to only show up on first day of created calendar appointment

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=18563

--- Comment #3 from Marc Véron <veron at veron.ch> ---
Specs:
https://tools.ietf.org/html/rfc5545#section-3.6.1

The "DTSTART" property for a "VEVENT" specifies the inclusive
start of the event.  For recurring events, it also specifies the
very first instance in the recurrence set.  The "DTEND" property
for a "VEVENT" calendar component specifies the non-inclusive end
of the event.  For cases where a "VEVENT" calendar component
specifies a "DTSTART" property with a DATE value type but no
"DTEND" nor "DURATION" property, the event's duration is taken to
be one day.  For cases where a "VEVENT" calendar component
specifies a "DTSTART" property with a DATE-TIME value type but no
"DTEND" property, the event ends on the same calendar date and
time of day specified by the "DTSTART" property.

This is an ics output from Koha / current master:

BEGIN:VCALENDAR
VERSION:2.0
PRODID:Data::ICal 0.21
BEGIN:VEVENT
DESCRIPTION:Your copy of Testtitle (barcode 12345) is due back at
  the library today
DTSTAMP:20170623T143352Z
DTSTART:20170704T215900Z
SUMMARY:Testtitle is due
UID:issue-2 at 192.168.1.27
END:VEVENT
END:VCALENDAR

I'm in Switzerland, so DTSTART defined in UTC time is 23.59 local time (+2,
daylight saving time)

Import in Thunderbird calendar displays OK, it shows 04.07.2017 23:59 for Begin
and for End. The event does not span to the next day.

Test on https://icalendar.org/validator.html passes OK.

Could it be that Outlook does not behave as expected? (see spec above: "...the
event ends on the same calendar date and time of day specified by the "DTSTART"
property.")

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