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3.8.3.1. Time Zone Identifier

Property Name

TZID

Purpose

This property specifies the text value that uniquely identifies the "VTIMEZONE" calendar component in the scope of an iCalendar object.

Value Type

TEXT

Property Parameters

IANA and non-standard property parameters can be specified on this property.

Conformance

This property MUST be specified in a "VTIMEZONE" calendar component.

Description

This is the label by which a time zone calendar component is referenced by any iCalendar properties whose value type is either DATE-TIME or TIME and not intended to specify a UTC or a "floating" time. The presence of the SOLIDUS character as a prefix, indicates that this "TZID" represents an unique ID in a globally defined time zone registry (when such registry is defined).

Note: This document does not define a naming convention for time zone identifiers. Implementers may want to use the naming conventions defined in existing time zone specifications such as the public-domain TZ database [TZDB]. The specification of globally unique time zone identifiers is not addressed by this document and is left for future study.

Format Definition

This property is defined by the following notation:

 tzid       = "TZID" tzidpropparam ":" [tzidprefix] text CRLF

 tzidpropparam      = *(";" other-param)

 ;tzidprefix        = "/"
 ; Defined previously. Just listed here for reader convenience.

Example

The following are examples of non-globally unique time zone identifiers:

 TZID:America/New_York

 TZID:America/Los_Angeles

The following is an example of a fictitious globally unique time zone identifier:

 TZID:/example.org/America/New_York

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