---
title: "CFTimeZoneGetNextDaylightSavingTimeTransition(_:_:)"
framework: corefoundation
role: symbol
role_heading: Function
path: "corefoundation/cftimezonegetnextdaylightsavingtimetransition(_:_:)"
---

# CFTimeZoneGetNextDaylightSavingTimeTransition(_:_:)

Returns the time in a given time zone of the next daylight saving time transition after a given time.

## Declaration

```swift
func CFTimeZoneGetNextDaylightSavingTimeTransition(_ tz: CFTimeZone!, _ at: CFAbsoluteTime) -> CFAbsoluteTime
```

## Parameters

- `tz`: The time zone to analyze.
- `at`: A time in tz.

## Return Value

Return Value The time in tz of the next daylight saving time transition after at.

## See Also

### Getting Daylight Savings Time Information

- [CFTimeZoneIsDaylightSavingTime(_:_:)](corefoundation/cftimezoneisdaylightsavingtime(_:_:).md)
- [CFTimeZoneGetDaylightSavingTimeOffset(_:_:)](corefoundation/cftimezonegetdaylightsavingtimeoffset(_:_:).md)