In 1793 French revolutionaries rejected the Gregorian calendar and introduced a new calendar in which weeks had 10 days, months were named for the weather and every day of the year was designated in honor of a plant, tool or animal. Highlights included days named for Celery, Goose, Hammer, Radish and Carp. Known as the calendrier républicain, citizens were instructed in no uncertain terms to abide by it. Of course, enforcing use of the calendar was even harder than using the calendar, so neither really happened. Comedy writer Ursula Lawrence has published a wall calendar version of the French Republican Calendar despite the fact that it was never meant for this purpose.