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# birthdayPersonUniqueID

The Address Book framework record identifier of the person for this birthday event.

```
var birthdayPersonUniqueID: String? { get }
```

## Discussion

This property is only set if this is a birthday event; otherwise the property is `nil`.

### Special Considerations

> Note:
> This property is equivalent to the ``doc://com.apple.eventkit/documentation/EventKit/EKEvent/birthdayPersonID`` property on iOS.

---

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