188.8.131.52.1.19.1 Property: TZID
RFC Reference: [RFC2445] section 184.108.40.206
Number of Instances Allowed: 1
Format: Text ([RFC2445] section 4.3.11)
Brief Description: The name of the time zone. This string will be compared (case-insensitive)<48> to TZID parameters in the rest of the iCalendar to identify the time zone being referenced by the parameter's parent property.
Importing to Calendar objects
Exporting from Calendar objects
If the system's local time zone is being exported as a VTIMEZONE, then this name MUST be derived from the system API that supplied the time zone.
If the PidLidAppointmentTimeZoneDefinitionRecur, PidLidAppointmentTimeZoneDefinitionStartDisplay, or PidLidAppointmentTimeZoneDefinitionEndDisplay property is being exported as a VTIMEZONE, then the value of TZID MUST<49> be derived from the KeyName field of the PidLidAppointmentTimeZoneDefinitionRecur structure ([MS-OXOCAL] section 220.127.116.11) contained in the property.
In all cases, TZIDs for different time zones MUST be unique, and each unique TZID MUST NOT be defined more than once.