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CalConnect Standards

Formally approved CalConnect Standards defining normative requirements for calendar and scheduling interoperability.

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cc-11001-2024
standard Ed. 0 2026-05-13
Calendaring — Task Extensions to iCalendar
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cc-18011-2018
standard Ed. 1 2026-05-13
Date and time — Explicit representation
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cc-18012-2018
standard Ed. 1 2026-05-13
Date and time — General recurrence representation
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cc-51008-2024
standard Ed. 1 2026-05-13
Calendar and scheduling — iCalendar Transport-Independent Interoperability Protocol (iTIP)
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cc-adv-0707-2007
standard Ed. 1 2026-05-13
CalConnect EDST (Extended Daylight Savings Time) Reflections and Recommendations
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cc-adv-18018-2018
standard Ed. 1 2026-05-13
CalConnect calls on EU to reconsider timeline for proposed seasonal time changes: Workshop and mailing list announced to discuss technical impact of planned changes
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cc-cd-51002-2026
standard Ed. 1 2026-05-13
vObject — Integrity protection for vObject, vCard and iCalendar
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cc-cd-51003-2018
standard Ed. 1 2026-05-13
Calendaring and scheduling — Support for Series in iCalendar
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cc-cd-51004-2018
standard Ed. 1 2026-05-13
Calendaring and scheduling — Support for iCalendar Relationships
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cc-cd-51005-2024
standard Ed. 1 2026-05-13
CalConnect Standard: Calendaring and scheduling — Calendar subscription upgrades
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cc-cd-51006-2024
standard Ed. 1 2026-05-13
Calendaring and scheduling — Consensus scheduling — iCalendar VPOLL component
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cc-cd-51011-2024
standard Ed. 1 2026-05-13
Calendaring and scheduling — iTip using PARTICIPANT only
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cc-cd-51015-2015
standard Ed. 1 2026-05-13
Calendaring and scheduling — v-event URI: An URI scheme for events
HTML PDF XML
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cc-cd-51016-2018
standard Ed. 1 2026-05-13
Calendaring and scheduling — CalDAV Auditing Status and Feedback
HTML PDF XML
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cc-cd-70025-2017
standard Ed. 1 2026-05-13
Calendaring and scheduling — Push Discovery and Notification Dispatch Protocol
HTML PDF XML
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cc-fds-10010-2019
standard Ed. 1 2026-05-13
CalConnect Partner Standards Cooperation Agreement
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cc-r-18003-2019
standard Ed. 1 2026-05-13
Calendar operator practices — Guidelines to protect against calendar abuse
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cc-s-0505-2005
standard Ed. 1 2026-05-13
Results from First Recurrence Questionnaire
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cc-s-0507-2005
standard Ed. 1 2026-05-13
CalDav Use Cases
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cc-s-0601-2005
standard Ed. 1 2026-05-13
Min-IOP (Minimum Interoperable Subset) Use Cases
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cc-s-0601-2006
standard Ed. 1.1 2026-05-13
Min-IOP (Minimum Interoperable Subset) Use Cases
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cc-s-0701-2007
standard Ed. 1 2026-05-13
Min-IOP (Minimum Interoperable Subset) Use Cases for Tasks (VTODO)
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cc-s-0706-2007
standard Ed. 1 2026-05-13
Mobile Calendar Interoperability Test Suite
HTML PDF XML
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cc-s-0706-2008
standard Ed. 1.1 2026-05-13
Mobile Calendar Interoperability Test Suite
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cc-s-0903-2009
standard Ed. 1 2026-05-13
Freebusy Read URL
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cc-s-0906-2009
standard Ed. 1 2026-05-13
Use Cases for Resources
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cc-s-1004-2010
standard Ed. 0.3 2026-05-13
Cal-WS Web Services API for Calendaring and Scheduling
HTML PDF XML
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cc-s-1202-2012
standard Ed. 1 2026-05-13
CalWS-SOAP SOAP Web Services Protocol for Calendaring
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cc-s-1301-2013
standard Ed. 1 2026-05-13
CalWS-SOAP SOAP Web Services Protocol for Calendaring
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cc-wd-24229-2022
standard Ed. 1 2026-05-13
Information and documentation — Codes for written language conversion systems
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cc-wd-34000-2019
standard Ed. 1 2026-05-13
Date and time — Concepts and terminology
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cc-wd-34100-2019
standard Ed. 1 2026-05-13
Date and time — Reference time scales
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cc-wd-51010-2017
standard Ed. 1 2026-05-13
Internet Calendar Scheduling Protocol (iSchedule)
HTML PDF XML
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cc-wd-51012-2016
standard Ed. 1 2026-05-13
vObject — vObject Model and vFormat Syntax
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cc-wd-51012-2017
standard Ed. 1 2026-05-13
Enhanced Synchronization for Calendaring Extensions to WebDAV (CalDAV)
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cc-wd-51013-2019
standard Ed. 1 2026-05-13
CalDAV Managed Attachments
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cc-wd-51014-2016
standard Ed. 1 2026-05-13
The iCalendar VINSTANCE Component
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cc-wd-51016-2018
standard Ed. 1 2026-05-13
Streaming Calendar and Contacts Data
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cc-wd-51017-2024-07-23
standard Ed. 1 2026-05-13
VALARM Extensions for iCalendar
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cc-wd-51019-2018
standard Ed. 1 2026-05-13
Resources for Developing Calendar Applications
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cc-wd-51020-2019
standard Ed. 1 2026-05-13
Collection Query Report for Web Distributed Authoring and Versioning (WebDAV)
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cc-wd-51021-2021
standard Ed. 1 2026-05-13
Event Publishing Extensions to iCalendar
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cc-wd-51022-2016
standard Ed. 1 2026-05-13
DAV Server Information Object
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cc-wd-51023-2022
standard Ed. 1 2026-05-13
Serverside Subscriptions
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cc-wd-56010-2019
standard Ed. 1 2026-05-13
vObject — Internationalization
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cc-wd-58011-2013
standard Ed. 1 2026-05-13
Schedulable Objectclass for vCard
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cc-wd-58012-2013
standard Ed. 1 2026-05-13
vCard representation of resources
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cc-wd-58013-2013
standard Ed. 1 2026-05-13
Objectclass property for vCard
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cc-wd-58020-2016
standard Ed. 1 2026-05-13
The iCalendar VPATCH Component
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