December 1

• Bifocals at the Monitor Liberation Day
• Day With(out) Art Day
• National Eat a Red Apple Day
• National Pie Day
• Rosa Parks Day

December 2

• National Fritters Day
• National Mutt Day
• Special Education Day 
• Faux Fur Friday – First Friday in December
• National Bartender Day – First Friday in December

December 3

• National Roof Over Your Head Day
• National Play Outside Day – First Saturday Every Month
• Skywarn Recognition Day – First Saturday in December

December 4

• National Cookie Day
• National Dice Day
• National Sock Day

• Bathtub Party Day
• International Ninja Day
• National Repeal Day
• National Sacher Torte Day

December 6

• Miners’ Day
• National Gazpacho Day
• National Microwave Oven Day
• National Pawnbrokers Day
• St. Nicholas Day
• World Trick Shot Day – First Tuesday in December

December 7

• National Cotton Candy Day
• National Illinois Day
• National Pearl Harbor Remembrance Day

December 8

• National Crossword Solvers Day ***
• National Brownie Day
• Pretend to Be a Time Traveler Day

December 9

• Christmas Card Day
• National Pastry Day
• Weary Willie Day
• National Salesperson Day – Second Friday in December

December 10

• Dewey Decimal System Day
• Human Rights Day
• National Lager Day
• Nobel Prize Day

December 11

• National Stretching Day ***
• National App Day
• National Noodle Ring Day

• National Ambrosia Day
• National Ding-a-Ling Day
• Gingerbread House Day
• Poinsettia Day

December 13

• National Cocoa Day
• National Violin Day
• National Day of the Horse  (Senate Res. 452)
• Pick a Pathologist Pal Day
• National Guard Birthday

December 14

• National Bouillabaisse Day
• National Alabama Day
• Monkey Day

December 15

• National Cupcake Day
• Bill of Rights Day
• Cat Herders Day
• National Wear Your Pearls Day

• National Chocolate-Covered Anything Day
• Barbie and Barney Backlash Day
• National Ugly Christmas Sweater Day – Third Friday in December
• Underdog Day– Third Friday in December

December 17

• National Maple Syrup Day
• Wright Brothers Day
• National Wreaths Across America Day – Changes Annually – (December 17, 2022)

December 18

• National Twin Day
• National Roast Suckling Pig Day
• Answer the Telephone Like Buddy the Elf Day
• Chanukah Begins – Changes Annually (December 18, 2022)

December 19

• National Hard Candy Day
• National Oatmeal Muffin Day

• Go Caroling Day
• National Sangria Day
• Mudd Day

• Crossword Puzzle Day
• Humbug Day
• National French Fried Shrimp Day
• National Maine Day
• Phileas Fogg Win a Wager Day
• Winter Solstice – Day Between December 20 and 23
• National Flashlight Day – Day of Winter Solstice
• National Homeless Persons’ Remembrance Day – First Day of Winter
• Yule – Day of Winter Solstice
• Anne & Samantha Day(also June. 21, 2022)

December 22

• National Date Nut Bread Day
• Forefathers Day – December 22 (Unless on Sunday, Then Following Monday)
• National Re-Gifting Day – Thursday before Christmas

December 23

• Festivus
• National Pfeffernusse Day
• National Roots Day

December 24

• Christmas Eve
• National Eggnog Day

• A’Phabet Day or No “L” Day
• Christmas
• National Pumpkin Pie Day

December 26

• Boxing Day (Canada)
• National Candy Cane Day
• National Thank-You Note Day
• National Whiner’s Day

December 27

• National Fruitcake Day

December 28

• Holy Innocents Day
• National Card Playing Day
• National Chocolate Candy Day
• National Short Film Day
• Pledge of Allegiance Day

• National Pepper Pot Day
• Tick Tock Day

December 30

• Bacon Day
• Falling Needles Family Fest Day
• National Bicarbonate of Soda Day
• No Interruptions Day – Last Work Day of the Year

December 31

• Make Up Your Mind Day
• National Champagne Day
• New Years Eve