| Human Rights and Peace Day | |  |
| International Mountain Day | | |
| Anniversary of the Statute of Westminster | | |
| Republic Day | | |
| National App Day | | |
| National Noodle Ring Day | | |
| Birthday of the Sultan of Selangor | | |
| Independence Day | | |
| National Have A Bagel Day | | |
| Day of Neutrality | | |
| Feast of Our Lady of Guadalupe | | |
| Jamhuri Day | | |
| National Ambrosia Day | | |
| National Ding-a-Ling Day | | |
| Gingerbread House Day | | |
| Poinsettia Day | | |
| National Salesperson Day | | |
| Official Lost and Found Day | | |
| International Day Of Neutrality | | |
| International Universal Health Coverage Day | | |
| National Day | | |
| Republic Day | | |
| National Guard Birthday | | |
| National Cocoa Day | | |
| National Violin Day | | |
| Pick A Pathologist Pal Day | | |
| National Wreaths Across America Day | | |
| Gingerbread Decorating Day | | |
| International Shareware Day | | |
| Day Of The Horse | | |
| National Bouillabaisse Day | | |
| Monkey Day | | |
| Third Advent Sunday | | |
| Worldwide Candle Lighting Day | | |
| World Choral Day | | |
| Roast Chestnuts Day | | |
| National Cupcake Day | | |
| Cat Herders Day | | |
| National Wear Your Pearls Day | | |
| Hanukkah Starts | | |
| Bill of Rights Day | | |
| Homecoming Day (only Alderney) | | |
| Dhanu Sankranti | | |
| National Day | | |
| Independence Day | | |
| National Chocolate Covered Anything Day | | |
| Day of Reconciliation | | |
| Barbie and Barney Backlash Day | | |
| Hanukkah II | | |
| Las Posadas | | |
| Stupid Toy Day | | |
| National Day (2nd day) | | |
| Independence Day (Day 2) | | |
| Pan American Aviation Day | | |
| Wright Brothers Day | | |
| National Maple Syrup Day | | |
| Hanukkah III | | |
| Saturnalia December | | |
| Arabic Language Day | | |
| National Day | | |
| Nigerien Republic Day | | |
| International Migrants Day | | |
| National Roast Suckling Pig Day | | |
| Answer The Telephone Like Buddy The Elf Day | | |
| National Re-Gifting Day | | |
| Hanukkah IV | | |
| Bake Cookies Day | | |
| Gluten-Free Baking Week | | |
