It was a jam-packed day that was 12 hours and 30 minutes long by the time it was over. (For timing purposes, "the day" lasts from the moment I depart my home for work in the morning to the moment I return in the evening.) I spent 11 of those hours actually in the office, and I feel it was a productive day. There will be work waiting for me in the morning, but I'm OK with that.