I think maybe retired people can let their bodies sync up with the sun as we're built to do. It's SO much healthier, for the heart and psyche as doctors know right now, and for the rest of the body systems also I believe. It's one of the things that I feel really fortunate about not working. (It's really not all it's cracked up to be overall, especially for someone who struggles with self-worth and motivation anyhow.)
These days the only time my alarm wakes me is for the club rides 
In the summer I'm awake plenty early. Right now, after the time change, I'll have a couple of weeks reprieve. But since our bedroom window faces northwest, and there's a pretty long eave, I don't get as much morning light as I'd like, so I don't usually wake until just a few minutes before actual sunrise, especially this time of year when the sun's farther south.
I'm just trying to figure out why the club has to ride out at 8 a.m. when it's 38 degrees... when it's going to be 65 by the time we get back... and even a 10 a.m. start would let us dress appropriately for the whole ride without having to carry a pack for heavy layers...
Speed comes from what you put behind you. - Judi Ketteler