---
title: Predefined Time Interval Values
framework: corefoundation
role: collectionGroup
role_heading: API Collection
path: corefoundation/predefined-time-interval-values
---

# Predefined Time Interval Values

Time intervals between the absolute reference date and certain other dates.

## Topics

### Constants

- [kCFAbsoluteTimeIntervalSince1970](corefoundation/kcfabsolutetimeintervalsince1970.md)
- [kCFAbsoluteTimeIntervalSince1904](corefoundation/kcfabsolutetimeintervalsince1904.md)

## See Also

### Constants

- [CFGregorianUnitFlags](corefoundation/cfgregorianunitflags.md)