Time (n.) is not a metaphysical phenomenon, nor a psychological phenomenon, but that which makes possible the perception of objects in time.
Time (n.) is to be treated as strictly within a phenomological explication of 'time-consciousness' whereby retention and protention, on the one hand, and recollection and expectation, on the other, are cornerstones of time-consciousness within which the ego keeps on moving or 'now-ing'.
Time (n.) is a completely self-contained sphere of problems, and one of exceptional difficulty.
Time (n.) as consciousness lives it is caught in a paradox: the flow in which experiences appear must itself appear as temporal, so conscious life seems infected with an infinite regress.
Time (n.) shared with others is founded in empathy: once another ego is there, my private time becomes merely one subject's view of an objective time — a community no one can dissolve.