| Jan 6 | National Take Down the Christmas Tree Day | Jace Shoemaker-Galloway |
| Jan 7 | Charlie Hebdo Day (France) | |
| Jan 7 | National Bobblehead Day | |
| Jan 7 | National Job Hunting Day | |
| Jan 9 | National Law Enforcement Appreciation Day | |
| Jan 13 | World Day to Combat Depression | |
| Jan 15 | National Pothole Day (UK) | |
| Jan 16 | International Croqueta Day | |
| Jan 16 | National Without a Scalpel Day | National Day Calendar |
| Jan 17 | Disabled Access Day | |
| Jan 20 | BBC Democracy Day (UK) | |
| Jan 21 | Lincoln Alexander Day (Canada) | |
| Jan 24 | National Readathon Day | |
| Jan 27 | International Mobile Phone Recycling Day | |
| Jan 30 | UN Social Media Day | |
| Feb 1 | 28 Days of Black Cosplay | |
| Feb 1 | Ectodermal Dysplasias Awareness Month | |
| Feb 1 | International Month of Black Women in the Arts | |
| Feb 1 | Visit My Mosque Day (UK) | |
| Feb 1 | Winter Walk to School Month (Wisconsin) | |
| Feb 2 | Chris Kyle Day (Texas) | |
| Feb 4 | Facebook Friends Day | |
| Feb 4 | Global School Play Day | |
| Feb 5 | Did You Fart? Day | |
| Feb 5 | National Shower with a Friend Day | |
| Feb 6 | Working Naked Day | |
| Feb 7 | PACS1 Awareness Day | |
| Feb 8 | International Day of Prayer and Awareness Against Human Trafficking | |
| Feb 8 | Reading Break Day (Finland) | |
| Feb 9 | International Epilepsy Day | |
| Feb 9 | National Develop Alternative Vices Day | |
| Feb 10 | National Deworming Day (India) | |
| Feb 12 | Wear Orange 4 Love Day | |
| Feb 13 | International Verify Your Backups Day | |
| Feb 15 | International Fanworks Day | |
| Feb 16 | Heritage Day (Nova Scotia) | |
| Feb 19 | World Anthropology Day | |
| Feb 20 | Day of the Heroes of the Heavenly Hundred (Ukraine) | |
| Feb 22 | Marie Day | |
| Feb 23 | Pinocchio Day | |
| Feb 25 | Commedia dell'Arte Day | |
| Feb 26 | Llama Dress Day | Social Media |
| Feb 27 | Special Operations Forces Day (Russia) | |
| Feb 28 | Camellia Day (California) | |
| Feb 28 | National CSA Day | |
| Mar 1 | Agricultural Safety Awareness Program (ASAP) Week | |
| Mar 1 | DECHOX (UK) | |
| Mar 1 | HR Professionals Week | |
| Mar 1 | KCNQ2 Awareness Week | |
| Mar 1 | World Telemark Day | |
| Mar 3 | Samgyeopsal Day (South Korea) | |
| Mar 3 | World Birth Defects Day | |
| Mar 4 | National Snack Day | Jace Shoemaker-Galloway |
| Mar 5 | Brooke Davis Day | Social Media |
| Mar 5 | Erotic World Book Day | |
| Mar 5 | International CVS Awareness Day | |
| Mar 5 | Madison Beer Day | |
| Mar 5 | National Industrial Design Day | |
| Mar 6 | Blackout Day | |
| Mar 6 | World Seagrass Day | |
| Mar 10 | National VITA Awareness Day | |
| Mar 11 | Nina Hartley Day | Social Media |
| Mar 13 | Celebrate Trails Day | |
| Mar 13 | Palestinian Culture Day | |
| Mar 14 | International Drone Day | |
| Mar 15 | International Stiff Person Syndrome Awareness Day | |
| Mar 16 | Dribble to Work Day | |
| Mar 17 | 317 Day (Indiana) | |
| Mar 18 | National Child Sexual Exploitation Awareness Day | |
| Mar 18 | St. Broccoli Day | |
| Mar 19 | Deskfast Day | |
| Mar 19 | Taxonomist Appreciation Day | |
| Mar 20 | International Grant Professionals Day | |
| Mar 21 | Global Sisterhood Day | |
| Mar 21 | National Renewable Energy Day | |
| Mar 22 | National Day of the Podenco (Spain) | |
| Mar 23 | International Day of the Wedding Planner | |
| Mar 23 | National Tamale Day | |
| Mar 24 | International Houdini Day | |
| Mar 24 | National Cheesesteak Day | |
| Mar 25 | National Bridesmaid Day | |
| Mar 26 | Free The Nipple Day | |
| Mar 26 | National Guard Day (Ukraine) | |
| Mar 26 | National Wear Pants Day | |
| Mar 27 | National Workplace Wellbeing Day (Ireland) | |
| Mar 29 | International Day of the Landless | |
| Mar 29 | National Pita Day | |
| Mar 29 | World Piano Day | |
| Mar 30 | World Idli Day | |
| Apr 1 | Cushing's Disease Awareness Month | |
| Apr 1 | Krabbe Disease Awareness Month | |
| Apr 1 | Louisiana Crawfish Awareness Month | |
| Apr 1 | National Jump in Muddy Puddles Day | |
| Apr 5 | 405 Day | |
| Apr 6 | Bohring-Opitz Syndrome Awareness Day | |
| Apr 6 | World Table Tennis Day | |
| Apr 7 | National Family Caregiver Day (Canada) | |
| Apr 8 | Cushing's Disease Awareness Day | |
| Apr 8 | National Animation Day (Russia) | |
| Apr 10 | National Sprint Car Day | |
| Apr 11 | National Board Game Day | |
| Apr 14 | International Goalkeeper Day | |
| Apr 15 | One Boston Day | |
| Apr 16 | National Orchid Day | National Day Calendar |
| Apr 17 | Thank an Herbalist Day | |
| Apr 18 | Raw Milk Cheese Appreciation Day | |
| Apr 19 | World Day of Action in Solidarity with Venezuela | |
| Apr 20 | International Peter Tosh Day | |
| Apr 20 | National Cold Brew Day | |
| Apr 23 | National Herb Week (Ireland) | |
| Apr 24 | International Sculpture Day | |
| Apr 25 | National Kiss of Hope Day | National Day Calendar |
| Apr 26 | World Intellectual Freedom Day | |
| Apr 27 | National Bubble Butt Appreciation Day | |
| Apr 28 | Clean Comedy Day | |
| Apr 28 | National BraveHearts Day | |
| Apr 28 | National Suck Breast Day | |
| Apr 30 | E-mail Debt Forgiveness Day | |
| Apr 30 | National Braid Day | |
| Apr 30 | National Military Brats Day | National Day Calendar |
| Apr 30 | World Robberfly Day | |
| May 1 | 501 Day | |
| May 1 | Arabian Horse Month | |
| May 1 | College Signing Day / National College Decision Day | |
| May 1 | International Day of the Podenco | |
| May 1 | May Sketch a Day | |
| May 1 | MerMay | |
| May 1 | VHL Awareness Month | |
| May 1 | World Lyme Day | |
| May 2 | National Bombshells' Day | |
| May 2 | Start Seeing Monarchs Day | National Day Calendar |
| May 2 | Trade Unions House Fire Anniversary (Ukraine) | |
| May 3 | International Grab A Kebab Day | |
| May 3 | International Grab a Boob Day | |
| May 4 | National FPIES Awareness Day | |
| May 4 | Water Professionals Appreciation Day (Georgia) | |
| May 5 | National Concert Day | |
| May 5 | National Enchilada Day | Foodimentary |
| May 5 | National Mayonnaise Day | |
| May 5 | Poem on Your Pillow Day | |
| May 7 | National Packaging Design Day | |
| May 7 | Tap Water Day (California) | |
| May 8 | Ace Day of Visibility | |
| May 9 | Global Big Day | |
| May 9 | Goku Day (Japan) | |
| May 9 | National Archery Day | National Day Calendar |
| May 9 | Piccolo Day | |
| May 9 | World Binturong Day | |
| May 9 | World Buckfast Day | |
| May 10 | National Lipid Day | |
| May 11 | World Melanoma Day | |
| May 13 | Inge Lehmann Day | Social Media |
| May 13 | National Crouton Day | |
| May 14 | International Dylan Thomas Day | |
| May 14 | International Ring14 Day | |
| May 14 | National Caesar Day (Canada) | |
| May 15 | National Pathological Demand Avoidance Day | |
| May 15 | National Pun Day | |
| May 15 | National Slider Day | |
| May 15 | Wear RED for VEDS Day | |
| May 16 | National Classic Movie Day | |
| May 17 | International Heritage Breeds Week | |
| May 18 | National Therapy Animal Day | |
| May 19 | National Scooter Day | |
| May 20 | Philly Loves PAWS Day (Philadelphia) | |
| May 21 | Eat More Fruits and Vegetables Day | |
| May 21 | Red Nose Day (US) | |
| May 22 | Growing Flavor in the Garden Day | |
| May 23 | Harvesting Healing Day | |
| May 23 | International Day of Women's Football | |
| May 23 | International Heritage Breeds Day | |
| May 23 | National Pork Roll Day | |
| May 24 | Long Snapper Appreciation Day | |
| May 25 | Global Surgery Day | |
| May 26 | Independent Artist Day | |
| May 27 | Cultivating Comedy Day | |
| May 28 | Whooping Crane Day | |
| May 29 | National Foot Fetish Day | |
| May 30 | Garden Amazement Day | |
| Jun 1 | 30 Days Wild (UK) | |
| Jun 1 | Disneyland Day | |
| Jun 1 | International Farhud Day | |
| Jun 1 | New Year's Resolution Recommitment Day | |
| Jun 2 | National Gun Violence Awareness Day | |
| Jun 2 | National Rotisserie Chicken Day | National Day Calendar |
| Jun 2 | Red Cross Giving Day | Self Declared |
| Jun 3 | Global Jewish Unity Day | |
| Jun 3 | Ni Una Menos Day (Argentina) | |
| Jun 3 | World Motern Day | |
| Jun 5 | No Elevators Day | |
| Jun 6 | International Ungulate Awareness Day | |
| Jun 6 | National Higher Education Day | |
| Jun 6 | Sacral Agenesis/ Caudal Regression Syndrome Awareness Day | |
| Jun 7 | World Poha Day | |
| Jun 10 | National Bae Day | |
| Jun 11 | National Making Life Beautiful Day | |
| Jun 11 | World Prostate Cancer Day | |
| Jun 12 | Idol Day | |
| Jun 12 | International Shia Day | |
| Jun 12 | National Week of Making | |
| Jun 12 | National X Day | |
| Jun 12 | Women's Veterans Day | |
| Jun 13 | International Albinism Awareness Day | |
| Jun 13 | Michael Jackson Vindication Day | |
| Jun 13 | National Rosé Day | |
| Jun 15 | Beer Day Britain | |
| Jun 15 | Blue Monday | |
| Jun 15 | World Meat Free Day | |
| Jun 16 | International Day of Family Remittances | |
| Jun 17 | National Teeth Whitening Day | |
| Jun 18 | National Cheesemaker's Day | |
| Jun 18 | Veterinary Appreciation Day | |
| Jun 19 | International Day for the Elimination of Sexual Violence in Conflict | |
| Jun 19 | National Community Radio Day (Ireland) | |
| Jun 20 | National Kouign Amann Day | |
| Jun 21 | International Day of Yoga | |
| Jun 21 | World Kamasutra Day (India) | |
| Jun 22 | National Kitchen Porter Day (UK) | |
| Jun 23 | International Dravet Syndrome Awareness Day | |
| Jun 23 | Runner's Selfie Day | |
| Jun 23 | World Whistleblower Day | |
| Jun 24 | National Upcycling Day | |
| Jun 26 | LGBTQ Equality Day | |
| Jun 26 | National Cream Tea Day | |
| Jun 27 | Get Into Your Sanctuary Day | |
| Jun 27 | International Day of Deafblindness | |
| Jun 27 | International Pineapple Day | |
| Jun 29 | Heterosexual Pride Day | |
| Jun 29 | International Museum Workers Day | |
| Jun 29 | National Smoothie Day | |
| Jul 1 | Disability Pride Month | |
| Jul 1 | Fibroids Awareness Month | |
| Jul 1 | International Polychaete Day | |
| Jul 2 | International Robot Day | |
| Jul 2 | World Disorders of the Corpus Callosum Day | |
| Jul 3 | National Fried Clam Day | National Day Calendar |
| Jul 8 | SPANA World Tea Party Day | |
| Jul 9 | National Day of Lesbian Visibility (Chile) | |
| Jul 12 | Feast of Saint Paisios of Mount Athos (Greece) | |
| Jul 13 | International Day of Sarcoma | |
| Jul 14 | National Day of Remembrance for Victims of Honour Based Abuse and Forced Marriage (UK) | |
| Jul 14 | National Newt Day | Social Media |
| Jul 15 | Prime Day | |
| Jul 15 | World Youth Skills Day | |
| Jul 16 | National Geordie Day (UK) | |
| Jul 17 | National Air Conditioner Day | |
| Jul 18 | National Sour Candy Day | National Day Calendar |
| Jul 18 | PADI Women's Dive Day | |
| Jul 19 | 719 Day (Colorado) | |
| Jul 19 | National Youth Empowerment Day | |
| Jul 21 | National Meow Day | |
| Jul 21 | World Gazpacho Day | |
| Jul 22 | Bump Day | |
| Jul 22 | International Love and Gratitude Day | |
| Jul 23 | National Refreshment Day | |
| Jul 24 | National Thermal Engineer Day | National Day Calendar |
| Jul 25 | International Day of Solidarity with Antifascist Prisoners | |
| Jul 25 | Traditional Palestinian Dress Day | |
| Jul 27 | National Renée Day | Social Media |
| Jul 27 | National Scotch Egg Day (UK) | |
| Jul 30 | Etherium's Birthday | |
| Jul 30 | National Whistleblower Day | |
| Aug 1 | Amblyopia Awareness Month | |
| Aug 1 | LIHEAP Action Month | |
| Aug 1 | National Jamaican Patty Day | |
| Aug 1 | Steelpan Month (Trinidad and Tobago) | |
| Aug 2 | National Coloring Book Day | |
| Aug 2 | National Ex-Girlfriend Day | |
| Aug 3 | Alligator Awareness Day | |
| Aug 3 | CLOVES Awareness Day | |
| Aug 3 | Terry Fox Day (Manitoba) | |
| Aug 3 | Yazidi Genocide Anniversary | |
| Aug 7 | National Handloom Day (India) | |
| Aug 8 | Five Nights at Freddy's Anniversary | |
| Aug 8 | Global Infinite Possibilities Day | |
| Aug 8 | TR-808 Day | |
| Aug 9 | Little Mix Day | Social Media |
| Aug 9 | World Baijiu Day | |
| Aug 10 | Momos Day | |
| Aug 10 | World Biofuel Day | |
| Aug 11 | National Panini Day | Foodimentary |
| Aug 12 | World Hirola Day | |
| Aug 13 | National Blueberry Day (UK) | |
| Aug 14 | Back British Farming Day (UK) | |
| Aug 14 | National Blood Bike Awareness Day (UK) | |
| Aug 15 | Clear the Shelters Day | |
| Aug 15 | International Play Lax Day | |
| Aug 15 | International Sailor Moon Day | |
| Aug 15 | SJS Memorial Day | |
| Aug 16 | World Helicopter Day | |
| Aug 17 | Coats' Disease Awareness Day | |
| Aug 17 | National I LOVE My Feet Day | |
| Aug 18 | Stevens Johnson Syndrome Awareness Day | |
| Aug 18 | World Day of Forest Fire Prevention | |
| Aug 20 | Farm24 (UK) | |
| Aug 20 | National Bacon Lovers' Day | |
| Aug 20 | National Latina Day | |
| Aug 22 | World Day for the End of Speciesism | |
| Aug 22 | World Jollof Rice Day | |
| Aug 23 | Hug Your Sweetheart Day | |
| Aug 26 | International Day Against Dengue | |
| Aug 26 | International Hausa Day | |
| Aug 26 | World Painted Dog Day | |
| Aug 27 | National Banana Pudding Day | |
| Aug 28 | Emirati Women's Day (UAE) | |
| Aug 28 | Emmett Till Day | |
| Aug 28 | Grandparents' Day (Mexico) | |
| Sep 1 | Ginger Cat Appreciation Day | |
| Sep 1 | Human Resources Professional Day (South Dakota) | |
| Sep 1 | National Fetal Alcohol Spectrum Disorders Awareness Month | |
| Sep 1 | National Mortgage Professionals Month | |
| Sep 1 | World Day of Prayer for the Care of Creation | |
| Sep 3 | World Day of Hygiene | |
| Sep 4 | Force Friday | |
| Sep 4 | National Joan Rivers Day | |
| Sep 4 | National Wine Day (Chile) | |
| Sep 5 | Achalasia Awareness Day | |
| Sep 6 | Colour Blind Awareness Day | |
| Sep 6 | Telephone Tuesday | |
| Sep 7 | Emotional Labor Day | |
| Sep 8 | Day of Jewish Unity | |
| Sep 8 | National Ampersand Day | |
| Sep 9 | National Career Day | |
| Sep 9 | National Share Your Care Day | |
| Sep 10 | National American Indian/Alaska Native Hope for Life Day | |
| Sep 11 | Gun Cleaning Day | |
| Sep 12 | National All Star Cheer and Dance Day | |
| Sep 12 | National Cheerleading Day | |
| Sep 14 | National Coloring Day | Jace Shoemaker-Galloway |
| Sep 15 | International Children's Growth Awareness Day | |
| Sep 15 | National Cheese Toast Day | |
| Sep 15 | National IT Professionals Day | |
| Sep 16 | International Potcake Day | |
| Sep 16 | National Tattoo Story Day | |
| Sep 17 | National Fox Day | |
| Sep 18 | National First Love Day | |
| Sep 18 | National Hunting, Trapping and Fishing Heritage Day (Canada) | |
| Sep 19 | National Lacrosse Day (UK) | |
| Sep 19 | Usher Syndrome Awareness Day | |
| Sep 19 | World Cyanotype Day | |
| Sep 19 | World Marrow Donor Day | |
| Sep 20 | National Security Officer Appreciation Week | |
| Sep 21 | National Sponge Candy Day | |
| Sep 23 | National Key Lime Pie Day | |
| Sep 24 | aHUS Awareness Day | |
| Sep 25 | Ethel Rosenberg Day of Justice (New York) | |
| Sep 25 | National Lobster Day | |
| Sep 25 | National Research Administrator Day | National Day Calendar |
| Sep 26 | Girls in Aviation Day | |
| Sep 26 | National Colouring Day (Canada) | |
| Sep 26 | National Dumpling Day | |
| Sep 27 | National Fall Foliage Week | |
| Sep 30 | Dads Take Your Child to School Day (Florida) | |
| Sep 30 | Limb Girdle Muscular Dystrophy Awareness Day | |
| Sep 30 | Palestinian Flag Day | |
| Sep 30 | Pink Out Day | |
| Oct 1 | International Coffee Day | |
| Oct 1 | National Pumpkin Spice Day | |
| Oct 1 | Raynaud's Awareness Month | |
| Oct 1 | Subaru Loves Pets Month | |
| Oct 2 | International Children's Palliative Care Day | |
| Oct 3 | Global Smoothie Day | |
| Oct 3 | World Day of Medical Social Work | |
| Oct 4 | International Zookeeper Day | |
| Oct 4 | National Work From Home Week | |
| Oct 5 | Chic Spy Day | |
| Oct 5 | Walk Maryland Day (Maryland) | |
| Oct 6 | Imagine a Day Without Water | |
| Oct 6 | National Fruit at Work Day | |
| Oct 6 | Organ Donor Enrollment Day (New York) | |
| Oct 7 | Random Acts of Poetry Day | |
| Oct 8 | National Hydrogen and Fuel Cell Day | |
| Oct 8 | National Salmon Day | |
| Oct 9 | CATober 9th | |
| Oct 10 | Day of Action Against Mercury Pollution (Peru) | |
| Oct 10 | Hug A Drummer Day | |
| Oct 10 | National Motorcycle Ride Day | National Day Calendar |
| Oct 10 | Progressive Rock Day | |
| Oct 11 | World Obesity Day | |
| Oct 12 | National Hug A Bassist Day | |
| Oct 12 | National Online Bank Day | |
| Oct 13 | National Erection Day | |
| Oct 14 | Defenders Day (Ukraine) | |
| Oct 14 | National Curves Day | |
| Oct 14 | World Day of Organ Donation | |
| Oct 15 | Global Peer Support Celebration Day | |
| Oct 15 | National Cheese Curd Day | |
| Oct 16 | National TPA Day | |
| Oct 16 | Shine A Light Night (Ireland) | |
| Oct 16 | World Pandesal Day | |
| Oct 17 | Global PT Day of Service | |
| Oct 17 | International Roller Skating Day | |
| Oct 17 | World Bedwetting Day | |
| Oct 19 | Thank Your Cleaner Day | |
| Oct 19 | World Slotting Day | |
| Oct 20 | International Home-Based Workers Day | |
| Oct 21 | Back to the Future Day | |
| Oct 22 | Clean Up the Earth Day | |
| Oct 22 | Eat a Pretzel Day | |
| Oct 23 | World Edible Insect Day | |
| Oct 23 | World Mozzarella Day | |
| Oct 24 | International Gibbon Day | |
| Oct 25 | International Hoist the Colours Day | |
| Oct 29 | Sea Slug Day | |
| Oct 30 | National Dashiki Day | |
| Oct 30 | National Publicist Day | National Day Calendar |
| Nov 1 | Acromegaly Awareness Day | |
| Nov 1 | Family Engagement in Education Month (Florida) | |
| Nov 1 | International Unicorn Day | |
| Nov 1 | Janet Jackson Day | |
| Nov 1 | National Apprenticeship Month | |
| Nov 1 | National Apprenticeship Week | |
| Nov 1 | National Gratitude Month | |
| Nov 2 | Dynamic Harmlessness Day | |
| Nov 3 | End Gossip Day | |
| Nov 3 | National Jigsaw Day (UK) | |
| Nov 3 | National Landlord Day | |
| Nov 4 | International Gimme Fiber Day | |
| Nov 5 | International Romani Language Day | |
| Nov 5 | National Love Your Red Hair Day | National Day Calendar |
| Nov 7 | European Radon Day | |
| Nov 7 | National Canine Lymphoma Awareness Day | National Day Calendar |
| Nov 7 | National Inuit Day (Canada) | |
| Nov 7 | National Wine Tasting Day | Jace Shoemaker-Galloway |
| Nov 7 | World Numbat Day | |
| Nov 8 | Day of Prayer for the Promotion of the Redemptorist Missionary Vocation | |
| Nov 8 | National STEM/STEAM Day | |
| Nov 8 | World Gift Day | |
| Nov 9 | Equal Pay Day (UK) | |
| Nov 9 | Honor Our LGBT Elders Day | National Day Calendar |
| Nov 9 | National Greek Yogurt Day | |
| Nov 10 | International Interns Day | |
| Nov 10 | World Top Up Day | |
| Nov 12 | International ATSEP Day | |
| Nov 12 | Oliver's Day | |
| Nov 14 | International CCHS Day | |
| Nov 14 | World Sexual Purity Day | |
| Nov 14 | World Syphilis Day (India) | Social Media |
| Nov 15 | Kimono Day (Japan) | |
| Nov 16 | World Antibiotic Awareness Week | |
| Nov 17 | International Happy Gose Day | |
| Nov 18 | European Day on the Protection of Children against Sexual Abuse and Sexual Exploitation | |
| Nov 18 | High Five a Librarian Day | |
| Nov 18 | International Poitin Day | |
| Nov 18 | National Feline Infectious Peritonitis (FIP) Awareness, Research, and Education Day | |
| Nov 19 | World Wide Pressure Injury Prevention Day | |
| Nov 20 | National Absurdity Day | |
| Nov 22 | International Ewing's Sarcoma Awareness Day | |
| Nov 24 | Grace Darling Day | |
| Nov 25 | National Rugby Day | |
| Nov 26 | Constitution Day (India) | |
| Nov 26 | Iron Deficiency Day | |
| Nov 27 | Green Friday | |
| Nov 27 | National Email Unsubscribe Day | Social Media |
| Nov 29 | National Rice Cake Day | |
| Nov 30 | National Mate Day (Argentina) | |
| Nov 30 | Saint Andrew's Day (UK) | |
| Dec 1 | E-Discovery Day | |
| Dec 2 | Love My Newspaper Day | |
| Dec 3 | National Tunnelling Day (UK) | |
| Dec 8 | National Christmas Tree Day | Jace Shoemaker-Galloway |
| Dec 9 | Ed Tech Appreciation Day | |
| Dec 9 | International Day of Commemoration and Dignity of the Victims of the Crime of Genocide and of the Prevention of this Crime | |
| Dec 10 | Audit In Action Day | |
| Dec 11 | Holiday Food Drive for Needy Animals Day | |
| Dec 12 | National Lost Day | |
| Dec 14 | National Screwdriver Day | |
| Dec 14 | Roast Chestnuts Day | |
| Dec 15 | Second Amendment Awareness Day (South Carolina) | |
| Dec 16 | APS Martyrs Day (Pakistan) | |
| Dec 18 | National Give a Wine Club Day | |
| Dec 20 | World Kajalism Day | |
| Dec 21 | Ribbon Candy Day | |
| Dec 21 | World Saree Day | |
| Dec 22 | National Cookie Exchange Day | Jace Shoemaker-Galloway |
| Dec 22 | Short Person Day | |
| Dec 28 | Brobdingnagian Proboscis Day | |
| Dec 30 | Ski Naked Day | |
