The closer time is to right now, the faster it moves. Things happen quickly just after they have happened, but after enough following events have taken place, time spreads out. Time (or history [and to some extent the future]) really happens in spurts, you don’t remember, or reminisce about, an entire event from start to completion, you remember moments throughout it. That is not to say that it is not possible to remember every aspect of an event, it is just moments are what you look fondly, or regrettably upon.