---
title: CFTimeZoneCopyKnownNames()
framework: corefoundation
role: symbol
role_heading: Function
path: corefoundation/cftimezonecopyknownnames()
---

# CFTimeZoneCopyKnownNames()

Returns an array of strings containing the names of all the time zones known to the system.

## Declaration

```swift
func CFTimeZoneCopyKnownNames() -> CFArray!
```

## Return Value

Return Value An array containing CFString objects representing all the known time zone names. Ownership follows the The Create Rule.

## See Also

### System and Default Time Zones and Information

- [CFTimeZoneCopyAbbreviationDictionary()](corefoundation/cftimezonecopyabbreviationdictionary().md)
- [CFTimeZoneCopyAbbreviation(_:_:)](corefoundation/cftimezonecopyabbreviation(_:_:).md)
- [CFTimeZoneCopyDefault()](corefoundation/cftimezonecopydefault().md)
- [CFTimeZoneCopySystem()](corefoundation/cftimezonecopysystem().md)
- [CFTimeZoneSetDefault(_:)](corefoundation/cftimezonesetdefault(_:).md)
- [CFTimeZoneResetSystem()](corefoundation/cftimezoneresetsystem().md)
- [CFTimeZoneSetAbbreviationDictionary(_:)](corefoundation/cftimezonesetabbreviationdictionary(_:).md)