CFAbsoluteTime Structure

Type used to represent a specific point in time relative to the absolute reference date of 1 Jan 2001 00:00:00 GMT.

typedef CFTimeInterval CFAbsoluteTime;
Discussion

Absolute time is measured by the number of seconds between the reference date and the specified date.  Negative values indicate dates/times before the reference date.  Positive values indicate dates/times after the reference date.

Availability
Declared In
CFDate.h