Why I Use A 24-Hour Clock

Another great weekend in Seattle, lots of partying, lots of fun. Get home Sunday night, and as usually happens after lots of staying out late carousing, can't get to sleep till after 1am sometime, but I still have to go into the school in the morning. I'm observing today, so no real stimuli to get the energy going, come home, throw on a movie, pass out. As also usually happens in the second sleep attempt after carousal, crazy hyper dreaming until I wake up suddenly, well-rested, and...

Oh fuck! It's 7:45! It's light outside already! School started ten minutes ago! Grab my phone to call and tell my mentor I'll be late... and...

19:45, my phone tells me. Dammit. I did it again.

It'd been years since this happened to me, but it used to happen kinda often in early college and in high school. Of course, twice I actually had slept through to morning, which doesn't make it any easier. Does this happen to anyone else partaking in afternoon naps?