December 11 is the 345th day in the Gregorian calendar. On this day, Indiana became the 19th state in the U.S., co-founder of Alcoholics Anonymous Bill Wilson took his final drink, and Apollo 17 become the final Apollo mission to land on the Moon. Famous birthdays include John Kerry, Hailee Steinfeld, and Osho. December 11 also marks International Mountain Day.
We have 4 holidays listed for December 11.
International Mountain Day
Mountains are some of the most interesting geological features that our world has to offer.
Christmas Jumper Day
From ugly sweaters to cozy mock necks, let's get into the spirit of the season.
National App Day
Take a selfie for the ’Gram, tweet your thoughts, or play your favorite music.