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RFC 5545, "Internet Calendaring and Scheduling Core Object Specification (iCalendar)", September 2009

Note: This RFC has been updated by RFC 5546, RFC 6868, RFC 7529, RFC 7953, RFC 7986, RFC 9073, RFC 9074, RFC 9253

Source of RFC: calsify (app)

Errata ID: 5872
Status: Rejected
Type: Technical
Publication Format(s) : TEXT
Reported By: Lars Henriksen
Date Reported: 2019-10-10
Rejected by: Alexey Melnikov
Date Rejected: 2020-03-25

Section 3.8.5.3 says: 

Weekly on Tuesday and Thursday for five weeks:

       DTSTART;TZID=America/New_York:19970902T090000
       RRULE:FREQ=WEEKLY;UNTIL=19971007T000000Z;WKST=SU;BYDAY=TU,TH

It should say:

Weekly on Tuesday and Thursday for five weeks:

       DTSTART;TZID=America/New_York:19970902T090000
       RRULE:FREQ=WEEKLY;UNTIL=19971002T000000Z;WKST=SU;BYDAY=TU,TH

Notes:

The UNTIL rule is inclusive, and October 7, a Tuesday, should not be included.
--VERIFIER NOTES--
Neil Jenkins wrote: This erratum is invalid. The original example, while slightly weird, is correct as is. The event's DTSTART time is 09:00 New York TIme, and the UNTIL time is 00:00 UTC, which is before this. Therefore you would not get a recurrence on the 7 Oct with this rule and so it would produce 10 occurrences, as specified. The "corrected text" is in fact invalid, as this would remove the 2nd Oct occurrence.

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