Type Property

timeIntervalSinceReferenceDate

The interval between 00:00:00 UTC on 1 January 2001 and the current date and time.

Declaration

@property(class, readonly) NSTimeInterval timeIntervalSinceReferenceDate;

Return Value

The interval between the system’s absolute reference date (00:00:00 UTC on 1 January 2001) and the current date and time.

Discussion

This method is the primitive method for NSDate. If you subclass NSDate, you must override this method with your own implementation for it.

See Also

Getting Time Intervals

- timeIntervalSinceDate:

Returns the interval between the receiver and another given date.

timeIntervalSinceNow

The interval between the date object and the current date and time.

timeIntervalSinceReferenceDate

The interval between the date object and 00:00:00 UTC on 1 January 2001.

timeIntervalSince1970

The interval between the date object and 00:00:00 UTC on 1 January 1970.

NSTimeIntervalSince1970

The number of seconds from 1 January 1970 to the reference date, 1 January 2001.