iCalendar

👥kind protocolusage collaborationenc nonetopology federatedentity transportid none

started: 1998
by: Frank Dawson, IETF
homepage: https://www.rfc-editor.org/rfc/rfc5545
wikipedia: https://en.wikipedia.org/wiki/ICalendar

iCalendar (RFC 5545) — the data format under .ics files, calendar invites, and CalDAV. Every calendar event in the world has been an iCalendar VEVENT at some point.