I'm not sure what it was, but I was sleepy most of the day, despite getting more sleep than yesterday. I ended up waking up later for morning workouts than I wanted to, and I almost forgot about my online Mandarin lesson scheduled today, one of many this summer in order to keep myself from getting too rusty for next year. Classes today were fun, and I got to nerd out about some poomsae details that I probably would not have gotten to know if it weren't for last week while preparing some people on the cycle for the upcoming pre-test.