A calendar contains information about unavailabilities.
| Field | Type | Description |
|---|---|---|
| VERSION | Version | Specifies the min/max versions a consumer must support in order to successfully parse the iCalendar object |
| CALSCALE | CalendarScale | Specifies the calendar system that this iCalendar object uses. If none is specified, then the calendar is assumed to be in "gregorian" format |
| PRODID | ProductId | Identifies the application that created the iCalendar object |
| UID | Uid | Defines a unique identifier for a component |
| DTSTAMP | DateTimeStamp | Defines the date that the calendar data was last modified |
| DTSTART | DateStart | Defines the date that an event, free/busy component, or timezone component starts |
| DTEND | DateEnd | Defines the date that an event or free/busy component ends |
| SUMMARY | Summary | Defines a short, one line summary of the component that this property belongs to |