My natural sleep cycle doesn't seem to conveniently fit into a 24-hour day. If I go to bed when I'm tired and wake up naturally, I find that each day I'm waking up about an hour later. I have experienced this twice in my life, so far. Once, after selling a business and taking some time off, I quit drinking coffee and after the effects wore off, that was my pattern. The second time was more recent. It isn't a problem, but it is interesting.
Anyone else experience anything like this?