CalConnect

The Calendaring and Scheduling Consortium

CalConnect (The Calendaring and Scheduling Consortium) is a nonprofit organization founded in 2004 that develops open standards for calendaring and scheduling. CalConnect brings together vendors, developers, and users of calendar systems to coordinate interoperability of iCalendar (RFC 5545/7986), CalDAV, and related calendaring technologies. CalConnect standards address gaps in the iCalendar ecosystem: calendaring event metadata, scheduling protocols, time-zone handling, and event publishing. Member organizations include major technology vendors, universities, and government agencies.

IndustrySyntax CalConnect identifiers follow the shape: CC[/<series>] <number>:<date>. The publisher token is always 'CC'. An optional series letter or token follows after a slash (A, WD, DIR, …). The number is a plain string (preserves leading zeros and sub-part separators like '0812-1' or '0707.1'). The date segment uses the ISO-style year format with optional month and day for full-date forms (e.g. 'CC/WD 51017:2024-07-23').

Doc Types

Components

Relations

Stages

Document Types 1

CalConnect Standard (CC)

CC▼

Components 4

Structured elements that make up a CalConnect identifier:

Publisher

CC — the canonical publisher token

e.g.CC

Series

Optional series letter or token (A, WD, DIR, etc.) appearing after the publisher, separated by slash

e.g.WD

:series

Number

Document number, kept as a string to preserve leading zeros and sub-part separators (0514, 0812-1, 0707.1)

e.g.51017

:number

Date

Publication date: always year; month/day present only for full-date forms (2024-07-23)

e.g.2024

:date

PubID Algebra 4

Relationships between CalConnect identifiers:

Relation	Description	Syntax	Example
Standard	Basic CalConnect Standard without series	`CC <number>:<year>`	`CC 18011:2018`
With Series	Series prefix after the publisher, separated by slash	`CC/<series> <number>:<date>`	`CC/DIR 10006:2019`
Full Date	Full-date form for working drafts	`CC/<series> <number>:<year>-<month>-<day>`	`CC/WD 51017:2024-07-23`
Without Publisher	Bare series+number form (no 'CC' prefix)	`[<series> ]<number>:<date>`	`DIR 10006:2019`