---
title: "init(previousTimeZone:)"
framework: foundation
role: symbol
role_heading: Initializer
path: "foundation/timezone/systemtimezonedidchangemessage/init(previoustimezone:)"
---

# init(previousTimeZone:)

Creates a message for a change in the system time zone.

## Declaration

```swift
init(previousTimeZone: TimeZone?)
```

## Parameters

- `previousTimeZone`: The system’s time zone prior to the change.