---
title: startTimeZone
framework: datadetection
role: symbol
role_heading: Instance Property
path: datadetection/datadetector/match/semanticdetails/calendarevent/starttimezone
---

# startTimeZone

An optional time zone object that may contain the time zone of the start date of the event.

## Declaration

```swift
let startTimeZone: TimeZone?
```

## See Also

### Calendar event properties

- [allDay](datadetection/datadetector/match/semanticdetails/calendarevent/allday.md)
- [startDate](datadetection/datadetector/match/semanticdetails/calendarevent/startdate.md)
- [endDate](datadetection/datadetector/match/semanticdetails/calendarevent/enddate.md)
- [endTimeZone](datadetection/datadetector/match/semanticdetails/calendarevent/endtimezone.md)