National days are days that are not holidays.  Some of the national days can be completely random and unusual. Here is the list of the 2018 National Days for the month of December in the United States.

Dec 1: National Christmas Lights Day

Dec 2: National Mutt Day

Dec 3: National Disability Day

Dec 4: National Cookie Day

Dec 5: National Repeal Day

Dec 6: National Gazpacho Day

            National Miners Day

Dec 7: National Cotton Candy

            National Letter Writing Day

            National Pearl Harbor Day of Remembrance

Dec 8:  National Brownie Day

Dec 9: National Llama Day

             National Pastry Day

Dec 12: National Ding-A-Ling Day

              National Gingerbread House Day

              National Poinsettia Day

Dec 13: National Horse Day

               National Ice Cream Day

               National Violin Day

               U.S. National Guard Birthday

Dec 14: National Free Shipping Day

              National Monkey Day

              National Salesperson Day

Dec 15: National Cat Herders Day

              National Cupcake Day

              National Wreaths Across America Day

Dec 16: National Chocolate Covered Anything Day

Dec 17: National Maple Syrup Day

Dec 18: Answer The Telephone Like Buddy The Elf Day

Dec 19: National Hard Candy Day

Dec 21:  National Crossword Puzzle Day

                National Ugly Sweater Day

Dec 22: National Short Person Day

               National Cookie Exchange Day

Dec 23: Festivus

Dec 26: National Candy Cane Day

               National Thank You Note Day

Dec 27: National Fruitcake Day

Dec 28: National Call a Friend Day

               National Chocolate Candy Day

Dec 29: Still Need To Do Day

Dec 30: National Bacon Day