A definition of time by relation of energy and mass

The determination of an exact status that time occupies within the framework of basic physical parameters is a key-challenge of natural science. Here we describe an approach of defining time by the relation of energy and mass on the basis of Einstein´s principle of equivalence E=mc². The equation contains the term time as a basic parameter in the natural constant c. A transposition of the formula leads to the fact, that time can be considered as a factor dependent on the relation of energy and mass. Here we conclude that time is only existent at a certain place, if energy and mass have a relation of neither zero nor infinite. Therefore time is continuously generated in every place due to the relation of energy and mass. The exposed introduction of a physical concept of time in the framework of fundamental parameters correlates with phenomena observable in nature.