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# calendarItemIdentifier

The calendar item’s unique identifier.

```
var calendarItemIdentifier: String { get }
```

## Discussion

This property is set when the calendar item is created and can be used as a local identifier. Use [`calendarItem(withIdentifier:)`](/documentation/EventKit/EKEventStore/calendarItem(withIdentifier:)) to look up the item by this value.

A full sync with the calendar will lose this identifier. You should have a plan for dealing with a calendar whose identifier is no longer fetch-able by caching its other properties.

## See Also

[`calendarIdentifier`](/documentation/EventKit/EKCalendar/calendarIdentifier)

A unique identifier for the calendar.

  [Calendar and Reminders Programming Guide](https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/EventKitProgGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40009765)


---

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