So tired...

I really don't know why, but it's all I can do to keep my eyes open today. Didn't go to bed too late last night, slept well, was up at a reasonable hour this morning, did some stuff, then had a huge three hour nap, and I'm still really tired. I'm coming to appreciate how precious weekends are again, and yet all I want to do is go back to bed.

Maybe it's the weather.