Maybe it's just because I'm young (hey, I don't know about you, but I'm feeling 22, because I am), but this is one of those things I've never really understood. I mean, sometimes it feels like some point in the past wasn't quite as long ago as it was, but I've never thought something as extreme as, say, "oh yeah, 2010 was only yesterday". A year has always felt like a long time to me, and it doesn't really feel like my experience of the length of a year has gotten much longer or shorter over time, at least not as far as I can remember.