[dev] [Tickets #4617] Re: Remote ICS Calendar Dates Off (fwd)

[Chris Stromsoe]

Ticket #4617 is marked as "Not A Bug".  I disagree with that status.

RFC 2445, section 4.8.2.2:

4.8.2.2 Date/Time End

    Property Name: DTEND

    Purpose: This property specifies the date and time that a calendar
    component ends.

    Value Type: The default value type is DATE-TIME. The value type can
    be set to a DATE value type.

    Property Parameters: Non-standard, value data type, time zone
    identifier property parameters can be specified on this property.

    Conformance: This property can be specified in "VEVENT" or
    "VFREEBUSY" calendar components.

    Description: Within the "VEVENT" calendar component, this property
    defines the date and time by which the event ends. The value MUST be
    later in time than the value of the "DTSTART" property.


According to the RFC, DTEND must be greater than DTSTART.  Which would 
seem to imply that in order to get "all day" behavior for a single VEVENT, 
DTEND = DTSTART + 1, not DTEND = DTSTART as it's currently interpreted.

The behavior of "DTEND = DTSTART + 1" being one day in length is supported 
by Google Calendar, Microsoft Outlook, and Mozilla SunBird at the least (I 
have not yet tested other calendards).

All of the iCal remote calendars I looked at that used VALUE=DATE also had 
DTEND as being DTSTART + 1 to signify a single day.



-Chris