Why does time feel like it's going faster?

Because the clock is slow, the clock is your mind, your mind is working slower as we age, therefore time seems faster. Also, each day week or year is a smaller percentage of your life than the one before it. When you were ten, 10% of your life had to pass before you reached your next birthday. When you're 50, only a year is only 2% of your age, so it seems to go by more quickly.