Recurrence and exclusions
04A recurrence set combines DTSTART with rule/date inclusions and EXDATE exclusions.
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAM§ 3.8.5 ↗
RFC 5545 · § 3.8.5EXAMPLE
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03
Keep the remaining set
The recurrence set is the actual dates left after exclusions.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
RRULE requires FREQ; UNTIL and COUNT must not both appear in one rule.
- RRULE requires FREQ; UNTIL and COUNT must not both appear in one rule.
- EXDATE exclusions take precedence over inclusions.
- Invalid dates or nonexistent local times are ignored rather than repaired into different occurrences.
Examples are illustrative. Consult the linked RFC and its errata for implementation details.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
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