Abstract
The knowledge of the evident qualities of time, such as its all-encompassing unidirectional relentless change, does not provide answers as to what time is or why it occurs. Those qualities do not identify what it is in the universe that intrinsically has those qualities. Thus, previously it has not been possible to achieve an adequate definition of time that includes the answers to those questions. Now, with the discovery that the continuing-existence of space plays the role of time in the universe, a complete definition of time is possible.