RFC Errata
RFC 5545, "Internet Calendaring and Scheduling Core Object Specification (iCalendar)", September 2009
Source of RFC: calsify (app)
Errata ID: 5215
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Richard Smith
Date Reported: 2017-12-24
Section 3.8.5.1 says:
Purpose: This property defines the list of DATE-TIME exceptions for recurring events, to-dos, journal entries, or time zone definitions. ... Conformance: This property can be specified in recurring "VEVENT", "VTODO", and "VJOURNAL" calendar components as well as in the "STANDARD" and "DAYLIGHT" sub-components of the "VTIMEZONE" calendar component.
It should say:
Purpose: This property defines the list of DATE-TIME exceptions for recurring events, to-dos or journal entries. ... Conformance: This property can be specified in recurring "VEVENT", "VTODO", and "VJOURNAL" calendar components.
Notes:
Section 3.8.5.1 describes Exception Date-Times (EXDATE).
tzprop (section 3.6.5) does not allow EXDATE.
(Of course, the problem could be that 3.6.5 should include EXDATE.)