I read an explanation of the accelerated appearance of time as we age. I was in my 20s at the time, but it fits accurately with my perception of time, especially as I get older, although the explanation surprised me at first. The original post comes close, except that new hobbies and experiences won't affect the acceleration effect. And from my experiences trying new things, I don't see this slowing things down at all. OK so here goes. I hope I can explain it adequately:
For each of us, time is measured by the length of our life at any given point in our life, rather than an arbitrary calendar. Consider all the time we have lived as one unit, our own personal unit. This unit gets divided up as we age and becomes smaller every year. At age 1 we have experienced 1 unit. So at age two we also experience one unit, but the distance between age 1 and age to are each 1/2 of that unit. At age 3, the distance between age 2 and 3 is only 1/3 of a unit. At age 70 the distance between age 69 and 70 is 1/70 of a unit, so things are wizzing by now, as we all have noticed much too well.
A side affect is that we can view historical timelines a bit more accurately (I think). For me, when I was 10, General Custer and his battalion of cavalry were wiped out by the Sioux Nation, in the long distant past. Today, I perceive it as one life span from his demise to my birth, not that long ago, actually. It simply isn't as ancient as I once thought.