| World AIDS Day | |  |
| Day of the First President of the Republic of Kazakhstan | | |
| National holiday | | |
| Republic Day | | |
| Restoration of Independence | | |
| National Eat a Red Apple Day | | |
| Bifocals at the Monitor Liberation Day | | |
| Day With(out) Art Day | | |
| Rosa Parks Day | | |
|
| First Sunday of Advent | | |
| Inauguration day | | |
| Good Neighborliness Day | | |
| Sovereignty Day | | |
| Freedom and Democracy Day | | |
| National Cookie Cutter Day | | |
| National Cookie Cutter Week | | |
| Operation Santa Paws | | |
| Gift Of Sight Month | | |
| National Tie Month | | |
| National Pear Month | | |
| Bingo’s Birthday Month | | |
| National Human Rights Month | | |
| National Day | | |
| International Day for the Abolition of Slavery | | |
|
| National Mutt Day | | |
| National Fritters Day | | |
| Special Education Day | | |
| Cyber Monday | | |
| Chatham Islands Anniversary Day | | |
| Westland Anniversary Day | | |
| Anniversary of the Coronation of King Tupou I | | |
| St. Andrew's Day observed | | |
| Play Basketball Day | | |
| Walt Disney Day | | |
| Make a Gift Day | | |
| Day of Navarre | | |
| International Day of Persons with Disabilities | | |
| National Roof Over Your Head Day | | |
| Giving Tuesday | | |
| World Trick Shot Day | | |
| Let’s Hug Day | | |
| Wear Brown Shoes Day | | |
| National Cookie Day | | |
| National Dice Day | | |
| National Sock Day | | |
| National Package Protection Day | | |
| Santa's List Day | | |
| International Cheetah Day | | |
| Cabernet Franc Day | | |
| World Wildlife Conservation Day | | |
| International Day Of Banks | | |
| International Volunteer Day for Economic and Social Development | | |
| World Soil Day | | |
| St Nicholas' Eve/Sinterklaas | | |
| National Sacher Torte Day | | |
| AFL-CIO Day | | |
| Bathtub Party Day | | |
| International Ninja Day | | |
| Martyrdom of Fatima | | |
|
| King Bhumibol's Birthday | | |
| National Repeal Day | | |
| St. Nicholas' Day | | |
| Army Day | | |
| Independence Day | | |
| Put On Your Own Shoes Day | | |
| Foundation of Quito | | |
| National Pawnbrokers Day | | |
| National Microwave Oven Day | | |
| National Gazpacho Day | | |
| Miners’ Day | | |
| Faux Fur Friday | | |
| Gospel Day | | |
| Constitution Day | | |
| Farmer's Day | | |
| National Bartender Day | | |
| Mitten Tree Day | | |
| Spitak Remembrance Day | | |
| International Civil Aviation Day | | |
| National Heroes Day | | |
| Eve of the Feast of the Immaculate Conception | | |
| The Feast of St. Ambrose (Milan) | | |
| Western Province Day | | |
| Letter Writing Day | | |
| Pearl Harbor Remembrance Day | | |
| National Cotton Candy Day | | |
| National Rhubarb Vodka Day | | |
| Skywarn Recognition Day | | |
| Global Fat Bike Day | | |
| Candle Day | | |
| Bodhi Day | | |
| Virgin of Caacupé Day | | |
| Battle Day | | |
| Constitution Day | | |
| National Youth Day | | |
| National Brownie Day | | |
| Pretend To Be A Time Traveler Day | | |
| Feast of the Immaculate Conception | | |
| Mother's Day | | |
| Santa Marian Kamalen Day | | |
| Second Advent Sunday | | |
| Saint Kliment Ohridski's Day | | |
| National Lard Day | | |
| Worldwide Candle Lighting Day | | |
| World Choral Day | | |
| National Heroes Day | | |
| International Anti-Corruption Day | | |
| Christmas Card Day | | |
| Republic Day | | |
| National Pastry Day | | |
| Weary Willie Day | | |
| Green Monday | | |
| World Genocide Commemoration Day | | |
| National Youth Day observed | | |
| Feast of the Immaculate Conception | | |
|
| National Llama Day | | |
| World Techno Day | | |
| International Day Of Veterinary Medicine | | |
| Human Rights Day | | |
| Constitution Day | | |
| Dewey Decimal System Day | | |
| Jane Addams Day | | |
| National Lager Day | | |
| Nobel Prize Day | | |
| Anniversary of Victory over ISIS | | |
| Hanukkah Ends | | |
| International Animal Rights Day | | |
| 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 | | |
| Gita Jayanti | | |
| 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 | | |
| International Day Of Neutrality | | |
| National Day | | |
| Republic Day | | |
| National Guard Birthday | | |
| National Cocoa Day | | |
| National Violin Day | | |
| Pick A Pathologist Pal Day | | |
| National Salesperson Day | | |
| Friday the 13th | | |
| Official Lost and Found Day | | |
| Day Of The Horse | | |
| National Bouillabaisse Day | | |
| Monkey Day | | |
| National Wreaths Across America Day | | |
| Gingerbread Decorating Day | | |
| International Shareware Day | | |
| Roast Chestnuts Day | | |
| National Cupcake Day | | |
| Cat Herders Day | | |
| National Wear Your Pearls Day | | |
| Bill of Rights Day | | |
| Third Advent Sunday | | |
| Homecoming Day (only Alderney) | | |
| Dhanu Sankranti | | |
| National Day | | |
| Independence Day | | |
| National Chocolate Covered Anything Day | | |
| Day of Reconciliation | | |
| Barbie and Barney Backlash Day | | |
| Las Posadas | | |
| Stupid Toy Day | | |
| National Day (2nd day) | | |
| Independence Day (Day 2) | | |
| Pan American Aviation Day | | |
| Wright Brothers Day | | |
| National Maple Syrup Day | | |
| 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 | | |
| Bake Cookies Day | | |
| Gluten-Free Baking Week | | |
| Remembrance Day for Roma and Sinti killed by Genocide | | |
| National Hard Candy Day | | |
| National Oatmeal Muffin Day | | |
| National Re-Gifting Day | | |
| National Heroes and Heroines Day | | |
| Orthodox St. Nicholas Day | | |
| National Emo Day | | |
| Macau S.A.R. Establishment Day | | |
| International Human Solidarity Day | | |
| Abolition of Slavery | | |
| National Sangria Day | | |
| National Ugly Christmas Sweater Day | | |
| Underdog Day | | |
| Mudd Day | | |
| December Solstice | | |
| Games Day | | |
| Go Caroling Day | | |
| International Dalek Remembrance Day | | |
| National French Fried Shrimp Day | | |
| Crossword Puzzle Day | | |
| Humbug Day | | |
| Phileas Fogg Win A Wager Day | | |
| National Homeless Persons’ Remembrance Day | | |
| National Flashlight Day | | |
| Yule | | |
| December Solstice | | |
| Dongzhi Festival | | |
| Turkish Language Day (Turkish community) | | |
| National Short Story Day | | |
| Don’t Make Your Bed Day | | |
| National Coquito Day | | |
| Ribbon Candy Day | | |
| Look On The Bright Side Day | | |
| National Short Girl Appreciation Day | | |
| Unity Day | | |
| National Date Nut Bread Day | | |
| Forefathers Day | | |
| Fourth Advent Sunday | | |
| Sambisa Memorial Day | | |
| Mathematics Day | | |
| National Cookie Exchange Day | | |
| National Short Person Day | | |
| National Pfeffernusse Day | | |
| National Roots Day | | |
| Festivus | | |
| Emperor's Birthday | | |
| Christmas Eve | | |
| Independence Day | | |
| Yap Constitution Day | | |
| National Eggnog Day | | |
| Christmas Eve (from 2pm) | | |
| Christmas Eve (Half Day) | | |
| Christmas Eve (from noon) | | |
| Christmas | | |
| Constitution Day | | |
| Christmas Day | | |
| Grav Mass Day | | |
| A'phabet Day or No "L" Day | | |
| National Pumpkin Pie Day | | |
| Boxing Day | | |
| Family Day | | |
| Synaxis of the Mother of God | | |
| Independence and Unity Day | | |
| Day of Goodwill | | |
| National Day of Thanksgiving | | |
| Proclamation Day | | |
| National Candy Cane Day | | |
| National Thank You Note Day | | |
| National Whiner’s Day | | |
| Hanukkah Starts | | |
| Kwanzaa (1st Day) | | |
| Day After Christmas Day | | |
| St. Stephen's Day | | |
| Second Day of Christmas | | |
| Constitution Day | | |
| National Fruitcake Day | | |
| Christmas Holiday | | |
| Hanukkah II | | |
| Visit The Zoo Day | | |
| Make Cut-Out Snowflakes Day | | |
| International Day Of Epidemic Preparedness | | |
| Holy Innocents | | |
| Day of the Holy Innocents | | |
| Republic Day | | |
| National Short Film Day | | |
| National Chocolate Candy Day | | |
| National Card Playing Day | | |
| Pledge of Allegiance Day | | |
| Hanukkah III | | |
| Incwala Day | | |
| National Call A Friend Day | | |
| Independence Day | | |
| National Pepper Pot Day | | |
| Tick Tock Day | | |
| Feast of the Holy Family | | |
| Hanukkah IV | | |
| Day of the Declaration of Slovakia as an Independent Ecclesiastic Province | | |
| National Bacon Day | | |
| National Bicarbonate of Soda Day | | |
| Falling Needles Family Fest Day | | |
| Hanukkah V | | |
| Rizal Day | | |
| Watch Night | | |
| Festival Day | | |
| December 31 Bank Holiday | | |
| National Champagne Day | | |
| Make Up Your Mind Day | | |
| No Interruptions Day | | |
| New Year's Eve | | |
| Hanukkah VI / Rosh Chodesh Tevet | | |
| Restoration Day | | |
| Unlucky Day | | |
