Before retiring, I rode my bicycle to work every day except when the temperature fell below 26 degrees Fahrenheit. (I did switch from gloves to mittens when the temperature was under 30.) I was pleased not to be polluting the air, and the ride was invigorating.
That was then.
Now, on a remarkably-warm-for-April day, I switched from my warmest jacket to my 40-degrees-or-over jacket for a walk to the library. It seemed like all of Cambridge was out walking to celebrate spring, but I was the only one wearing a jacket.