What a day for science! Louis Pasteur was born today in 1822 and Johannes Kepler in 1571.
In a very different sphere, unless I suppose one enjoys experimenting with them, it's also national Fruitcake Day. Speaking of fruit and cakey items, the luncheon suggestion for today from 365 Luncheon Dishes (from 1902) is Apple Griddlecakes, in which you stir finely chopped apples into your favorite pancake batter.