Ride in was early, 5AM, for a meeting. It was 37F and there was still a lot of traffic on my regular route that early. Ride home was 43F with a 12MPH tailwind. I was kicking butt coming home. It was fun passing cars on the left and getting that incredulous "You're passing me on a bicycle?" look. Strange that they were not speeding, but good none the less. 13hour workday doesn't feel so bad if I get to ride both ways.