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# timestamp

The time when the event occurred.

```
var timestamp: TimeInterval { get }
```

## Discussion

This property contains the number of seconds that have elapsed since system startup. For a description of this time value, see the description of the <doc://com.apple.documentation/documentation/Foundation/ProcessInfo/systemUptime> method of the <doc://com.apple.documentation/documentation/Foundation/ProcessInfo> class.

---

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