via NationalDayCalendar:
Bathtub Party Day is observed annually on December 5. Bathtub Party Day was created as a way to skip the ordinary, everyday shower and to luxuriate in the pure pleasure of a good soak in the tub.
HOW TO OBSERVE
Gather your favorite bath bomb, a good book and a glass of Moscato and let the worries of the day fade away while you relax in the tub. Use #BathtubPartyDay to post on social media. And be sure to use soap behind those ears of yours too!