December 1
National Eat a Red Apple Day
National Pie Day
Rosa Parks Day
December 2
National Fritters Day
National Mutt Day
National Special Education Day
December 3
National Roof Over Your Head Day
December 4
National Cookie Day
National Dice Day
National Sock Day
December 5
International Ninja Day
National Sacher Torte Day
December 6
National Miner's Day
National Gazpacho Day
St. Nicholas Day
December 7
National Cotton Candy Day
National Illinois Day
Pearl Harbor Day
December 8
National Crossword Solvers Day
National Brownie Day
National Pretend to be a Time Traveler
December 9
National Christmas Card Day
National Pastry Day
December 10
National Dewey Decimal System Day
National Human Rights Day
National Nobel Prize Day
December 11
National Stretching Day
National App Day
December 12
National Ambrosia Day
National Gingerbread House Day
National Poinsettia Day
December 13
National Cocoa Day
National Day of the Horse
National Guard Birthday
December 14
National Bouillabaisse Day
National Monkey Day
National Alabama Day
December 15
National Cupcake Day
National Bill of Rights Day
National Cat Herders Day
December 16
National Chocolate-Covered Anything Day
December 17
National Maple Syrup Day
Wright Brothers Day
December 18
National Twin Day
National Answer the Telephone Like Buddy the Elf Day
December 19
National Hard Candy Day
National Oatmeal Muffin Day
December 20
Go Caroling Day
Mudd Day
December 21
Crossword Puzzle Day
Humbug Day
National Maine Day
December 22
National Date Nut Bread Day
December 23
Festivus
National Pfeffernusse Day
National Roots Day
December 24
Christmas Eve
National Eggnog Day
December 25
No "L" Day
Christmas Day
National Pumpkin Pie Day
December 26
National Candy Cane Day
National Thank-You Note Day
Boxing Day
December 27
National Fruitcake Day
December 28
National Card Playing Day
National Chocolate Candy Day
Pledge of Allegiance Day
December 29
National Pepper Pot Day
Tick Tock Day
December 30
National Bacon Day
National Baking Soda Day
December 31
National Make Up Your Mind Day
New Year's Eve
Universal Hour of Peace