So today at lunchtime I looked out the window. It was snowing pretty definitely, but the snow wasn't "sticking" -- the sidewalks were wet, not white. Gotta start sometime. I walked from Smith Center (where my building is) to Dairy Rd (a distance of 0.7 miles, says Google Maps), and back again. I started out at a brisk pace, thinking "this IS for exercise, after all", but before I got to Dairy Rd, I was clearly running short of oxygenation, so I slowed down to a moderate but purposeful pace (120 steps per minute, definitely not a stroll). Time from the parking lot to Dairy Rd: 13:00 even.
I kept the pace slower coming back. Time from Dairy Rd to the parking lot: 11:55. [Don't ask me!]
So that's one day.