There is a card in the game Fluxx which allows you to remove new rules. My attempt on the Festive 500 started with a fairly simple schedule, but with the premise that I would just ride some of my normal local roads, adjusted for the weather.
In the end, after a hilly first fit on Christmas Eve, and painful sinuses on Christmas Day and Boxing Day, I decided to… simplify.
One of my least interesting but least weather prone routes is straight out to Hollingworth Lake on the main road. It’s not flat but as it is along the valley until the little climb to the lake it is somewhat sheltered and generally well gritted and snow free.
So I just rode out and back… repeatedly. In some cold, windy and then very wet weather.