Both work with me. Time does fly when I am having a good time and want the time to last and last but other times the day drags on forever it seems like. I am not complaining though, I would rather time slow down a little bit.
Time does fly. And as one ages, it flies faster. I'm sure that as we fill ourselves up with busy-ness and knowledge, the mind has little rest time, even when we believe we are quiet and relaxed.