The new year approaches. But what if you had to learn a completely new calendar for the coming year? For about a dozen years starting in the late 19th century, France abandoned the Gregorian calendar for an entirely different one.
Research:

Elizabeth Bisland, Beyond the Trip Around the World
42:54

SYMHC Classics: Marie Laurencin
32:46

Behind the Scenes Minis: Censorship Cats
26:59