[calsify] [Errata Rejected] RFC5545 (5082)

RFC Errata System <rfc-editor@rfc-editor.org> Tue, 16 January 2024 14:53 UTC

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Subject: [calsify] [Errata Rejected] RFC5545 (5082)
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The following errata report has been rejected for RFC5545,
"Internet Calendaring and Scheduling Core Object Specification (iCalendar)".

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You may review the report below and at:
https://www.rfc-editor.org/errata/eid5082

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Status: Rejected
Type: Technical

Reported by: George Sexton <georges@mhsoftware.com>
Date Reported: 2017-08-10
Rejected by: Francesca Palombini (IESG)

Section: 3.8.7.3

Original Text
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N/A

Corrected Text
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The value must not be in the future.

Notes
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If future values are allowed for LAST-MODIFIED, it makes it very difficult for software to perform change management for a VEVENT.

Say for example, an event is imported from a source and the VEVENT has a future date. For example, December 20 2017 12:00:00Z

That event is then edited and assigned the actual correct date and time. Say August 9 2017 13:45:44Z.

Software that examines the VEVENT's LAST-MODIFIED to determine if the VEVENT record has been modified will not see the VEVENT is updated. 

In order for different systems to perform change management, the value for LAST-MODIFIED should NEVER be a future date.
 --VERIFIER NOTES-- 
The description of the property already implies that it is not in the future.  And any handling of clock skew is an iTIP/CalDAV protocol issue, NOT a data format issue.

See https://mailarchive.ietf.org/arch/msg/calsify/x82GopunVcEh8y5UGSIsEIC3s6M/

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RFC5545 (draft-ietf-calsify-rfc2445bis-10)
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Title               : Internet Calendaring and Scheduling Core Object Specification (iCalendar)
Publication Date    : September 2009
Author(s)           : B. Desruisseaux, Ed.
Category            : PROPOSED STANDARD
Source              : Calendaring and Scheduling Standards Simplification
Area                : Applications
Stream              : IETF
Verifying Party     : IESG