I've noticed a long time ago that time seems to be very subjective. One example that happened many years ago: I became sick at work and decided to go home for the afternoon. Time could fly, but in this case it dragged. I would think that at least an hour or more had passed, only to find out it was only about 15 minutes later. This went on until it was time to go home. Also while watching an interesting movie or a sports game, time seems to fly by.
I've concluded our perception of time is very subjective. I now know why, and it wasn't just my imagination. So what is time, really? It's all in our brain. LOL Good article on the "why" of this phenomena.