---
title: birthdayContactIdentifier
framework: eventkit
role: symbol
role_heading: Instance Property
path: eventkit/ekevent/birthdaycontactidentifier
---

# birthdayContactIdentifier

The contact identifier of the person for this birthday event.

## Declaration

```swift
var birthdayContactIdentifier: String? { get }
```

## Discussion

Discussion This property only applies to events in the built-in Birthdays calendar. It specifies the contact identifier (for use with the Contacts framework) of the person for whom the system created this event. For any other type of event, this property returns nil.

## See Also

### Accessing Event Properties

- [eventIdentifier](eventkit/ekevent/eventidentifier.md)
- [availability](eventkit/ekevent/availability.md)
- [startDate](eventkit/ekevent/startdate.md)
- [endDate](eventkit/ekevent/enddate.md)
- [isAllDay](eventkit/ekevent/isallday.md)
- [occurrenceDate](eventkit/ekevent/occurrencedate.md)
- [isDetached](eventkit/ekevent/isdetached.md)
- [organizer](eventkit/ekevent/organizer.md)
- [status](eventkit/ekevent/status.md)
- [structuredLocation](eventkit/ekevent/structuredlocation.md)
- [birthdayPersonID](eventkit/ekevent/birthdaypersonid.md)
- [birthdayPersonUniqueID](eventkit/ekevent/birthdaypersonuniqueid.md)