I've ridden twice today, separated by sleep, since I worked a 1 PM to 1 AM shift yesterday.

The two rides prove all the old adages about preparation. My 1 AM ride with 24 F temperature and heavy winds was much more comfortable than my 5 PM recreational ride at about 35 degrees with moderate winds. The reason was that I spent a half hour preparing for the 1 AM return commute, and just threw on minimal gear for the 5 PM ride. On the 5 PM ride I wore no ear covering, resulting in significant pain. Yowch!!!