Time is a highly complex concept,which is daily experienced as qualitative reality,utilized in science and classical physics as quantitative units,but denied by quantum physics.The time concept can be explained as emergence from the physics perspective,or as abstraction of time components,in the context of biopsychology,where quantitative time components are associated with the initial qualitative concept of time experience.Successive abstraction of the associated components renders the time concept more adaptable to different situations in both physics and daily life.The aspect of tense—with past,present,and future—positions time with respect to specific observers.However,as in physics,many experimental outcomes have to be grouped and individual;tenses must be excluded.The same is true for individual calendar references,which have to be replaced by time units.Newton’s absolute time was replaced in Einstein’s relativity theory by relative time.Whereas the aforementioned time concepts were based on waiting time corresponding to time flow characterized by waiting intervals between successive events,physics requires reference time stored on any kind of support,such as human memory or a magnetic deviceonly identifying time as its sources,.With support-fixed time,successive events are simultaneously accessible on the support,thus eliminating the waiting intervals.Support fixed time can be reduced to simple relations that appear timeless,and are more adapted to physical formalism.