| New Year's Day | |  |
| Liberation Day | | |
| Republic Day/New Year's Day | | |
| New Year's Day/Independence Day | | |
| Republic Day | | |
| Restoration of the Czech Independence Day | | |
| Independence Day | | |
| Polar Bear Plunge Day | | |
| National Hangover Day | | |
|
| National Bloody Mary Day | | |
| National Thank God It’s Monday Day | | |
| Diet Resolution Week | | |
| National Silent Record Week | | |
| Celebration Of Life Week | | |
| New Year’s Resolutions Week | | |
| National Folic Acid Awareness Week | | |
| National Mentoring Month | | |
| National CBD Month | | |
| National Bath Safety Month | | |
| National Black Diamond Month | | |
| National Blood Donor Month | | |
| National Braille Literacy Month | | |
| National Hobby Month | | |
| National Hot Tea Month | | |
|
| National Oatmeal Month | | |
| National Slavery And Human Trafficking Prevention Month | | |
| National Slow Cooking Month | | |
| National Soup Month | | |
| National Sunday Supper Month | | |
| Global Family Day | | |
| Public Domain Day | | |
| National First Foot Day | | |
| Apple Gifting Day | | |
| Z Day | | |
| Ring A Bell Day | | |
| Copyright Law Day | | |
| Euro Day | | |
| Commitment Day | | |
| Weigh-In Day | | |
| National Menudo Month | | |
| Universal Hour Of Peace | | |
| Ginuary | | |
| National Clean Up Your Computer Month | | |
| Dry January | | |
| International Brainteaser Month | | |
| Manuary | | |
| Get A Balanced Life Month | | |
| Celebration Of Life Month | | |
| International Creativity Month | | |
| January 2 Bank Holiday | | |
| New Year's Day Holiday | | |
| New Year's Day Holiday | | |
| Heroes’ Day/Ancestors’ Day | | |
| 2nd January | | |
| Run It up the Flagpole and See If Anyone Salutes It Day | | |
| Berchtold Day | | |
| Carnival Day | | |
| National Science Fiction Day | | |
| National Personal Trainer Awareness Day | | |
|
| National Buffet Day | | |
| National Cream Puff Day | | |
| New Year's weekend | | |
| New Year Holiday Week | | |
| New Year holiday | | |
| Reconquest Day | | |
| Public Holiday (January) | | |
| Swiss Cheese Day | | |
| National Pet Travel Safety Day | | |
| 55 Mph Speed Limit Day | | |
| Happy Mew Year For Cats Day | | |
| Motivation And Inspiration Day | | |
| World Introvert Day | | |
| January 3 Bank Holiday | | |
| New Year's Day Holiday | | |
| Festival of Sleep Day | | |
| National Chocolate Covered Cherry Day | | |
| National Drinking Straw Day | | |
| National Fruitcake Toss Day | | |
| New Year Holiday Week | | |
| Revolution Day | | |
| Women Rock! Day | | |
| International Mind-Body Wellness Day | | |
| Humiliation Day | | |
| Perihelion Day | | |
| New Year's Day Holiday | | |
| Independence Day | | |
| World Braille Day | | |
| Day of King Amador | | |
| Martyrs of Independence Day | | |
| National Spaghetti Day | | |
| National Trivia Day | | |
| New Year Holiday Week | | |
| Tom Thumb Day | | |
| Pop Music Chart Day | | |
| Guru Gobind Singh Birthday | | |
| Armenian Christmas Eve | | |
| Twelfth Night | | |
| National Keto Day | | |
| National Bird Day | | |
| National Whipped Cream Day | | |
| National Screenwriters Day | | |
| New Year Holiday Week | | |
| Epiphany | | |
| The Three Wise Men Day | | |
| Day of the Holy Kings | | |
| Three Kings Day | | |
| Armenian Christmas Day | | |
| Army Day | | |
| Christmas Eve (Orthodox) | | |
| Orthodox Christmas Eve | | |
| National Bean Day | | |
| National Shortbread Day | | |
| National Technology Day | | |
| National Cuddle Up Day | | |
|
| Twelfth Night | | |
| National Take Down The Christmas Tree Day | | |
| World Day For War Orphans | | |
| Apple Tree Day | | |
| Victory over Genocide Day | | |
| Orthodox Christmas Day | | |
| Christmas Day | | |
| Coptic Christmas Day | | |
| Christmas Day (Orthodox) | | |
| Pioneers Day | | |
| Coptic Christmas | | |
| Old Rock Day | | |
| Ethiopian Christmas Day | | |
| National Bobblehead Day | | |
| National Tempura Day | | |
| Constitution Day | | |
| Baptism of the Jesus | | |
| National Pass Gas Day | | |
| Harlem Globetrotters Day | | |
| I’m Not Going To Take It Anymore Day | | |
| Christmas Day, day 2 (Orthodox) | | |
| Orthodox Christmas Day holiday | | |
| Earth's Rotation Day | | |
| National Argyle Day | | |
| National Bubble Bath Day | | |
| National English Toffee Day | | |
| National JoyGerm Day | | |
| National Winter Skin Relief Day | | |
| National Clean Off Your Desk Day | | |
| Epiphany | | |
| Coming of Age Day | | |
| New Year Holiday Week | | |
| Christmas Day observed | | |
| War On Poverty Day | | |
| Show And Tell At Work Day | | |
| National Gluten Free Day | | |
| Martyrs' Day | | |
| Word Nerd Day | | |
| Peace Agreement Day | | |
| National Apricot Day | | |
| National Law Enforcement Appreciation Day | | |
| National Static Electricity Day | | |
| National Shop for Travel Day | | |
| Day of the Republika Srpska | | |
| International Choreographers Day | | |
| National Cassoulet Day | | |
| Play God Day | | |
| National Balloon Ascension Day | | |
| Poetry At Work Day | | |
| Margaret Thatcher Day | | |
| Vodoun Festival | | |
| Majority Rule Day | | |
| National Bittersweet Chocolate Day | | |
| National Cut Your Energy Costs Day | | |
| National Oysters Rockefeller Day | | |
| National Save The Eagles Day | | |
| National Houseplant Appreciation Day | | |
| Peculiar People Day | | |
| National Take The Stairs Day | | |
| Learn Your Name in Morse Code Day | | |
| Kosrae Constitution Day | | |
| Anniversary of the Independence Manifesto | | |
| National Milk Day | | |
| National Human Trafficking Awareness Day | | |
| National Step in the Puddle and Splash Your Friends Day | | |
| Cuckoo Dancing Week | | |
| International Parity At Work Day | | |
| National Girl Hug Boy Day | | |
| Secret Pal Day | | |
| National Hot Toddy Day | | |
| Heritage Treasures Day | | |
| World Sketchnote Day | | |
| Geok Tepe Memorial Day | | |
| Zanzibar Revolution Day | | |
| Kiss A Ginger Day | | |
| National Pharmacist Day | | |
| National Curried Chicken Day | | |
| National Marzipan Day | | |
| Lee-Jackson Day | | |
| Berber New Year | | |
| National Youth Day in India | | |
| National Hot Tea Day | | |
| Constitution Day | | |
| Democracy Day | | |
| Make Your Dreams Come True Day | | |
| Stephen Foster Memorial Day | | |
| Liberation Day | | |
| Korean American Day | | |
| National Sticker Day | | |
| National Rubber Ducky Day | | |
| National Peach Melba Day | | |
| National Vision Board Day | | |
| National Children's Day | | |
| Maghi - Lohri | | |
| Public Radio Broadcasting Day | | |
| Makar Sankranti | | |
| Old New Year | | |
| Orthodox New Year | | |
| Defenders of the Motherland Day | | |
| Organize Your Home Day | | |
| Revolution and Youth Day | | |
| National Hot Pastrami Sandwich Day | | |
| National Dress Up Your Pet Day | | |
| National Sunday Supper Day | | |
| Birthday of Yang di-Pertuan Besar | | |
| National Mocktail Week | | |
| National Pizza Week | | |
| Universal Letter Writing Week | | |
| Home Office Safety And Security Week | | |
| Cesarean Section Day | | |
| International Kite Day | | |
| John Chilembwe Day | | |
| National Bagel Day | | |
| National Hat Day | | |
| National Booch Day | | |
| National Strawberry Ice Cream Day | | |
| Martin Luther King Jr Day | | |
| Martin Luther King Jr. Day | | |
| Robert E. Lee's Birthday | | |
| Idaho Human Rights Day | | |
| Civil Rights Day | | |
| Martin Luther King Jr. Day | | |
| Pongal | | |
| Tamil Thai Pongal Day | | |
| Blue Monday | | |
| Wikipedia Day | | |
| Elementary School Teacher Day | | |
| National Pothole Day | | |
| No Name Calling Week | | |
| Signing of the Peace Accords | | |
| Teachers' Day | | |
| Anniversary of President Laurent Kabila’s Assassination | | |
| Nothing Day | | |
| National Without a Scalpel Day | | |
| National Religious Freedom Day | | |
| National Fig Newton Day | | |
| International Hoof Care Week | | |
| National Quinoa Day | | |
| National Good Teen Day | | |
| International Hot And Spicy Food Day | | |
| National Appreciate A Dragon Day | | |
| Kid Inventors' Day | | |
| Ditch New Year's Resolution Day | | |
| Anniversary of Prime Minister Patrice Emery Lumumba’s Assassination | | |
| National Hot Buttered Rum Day | | |
| National Bootlegger’s Day | | |
| Popeye Day | | |
| Cable Car Day | | |
| Museum Selfie Day | | |
| National Winnie The Pooh Day | | |
| National Peking Duck Day | | |
| National Thesaurus Day | | |
| Get to Know Your Customers Day | | |
| National Gourmet Coffee Day | | |
| Women’s Healthy Weight Day | | |
| Orthodox Epiphany | | |
| National Tin Can Day | | |
| Robert E. Lee's Birthday | | |
| World Quark Day | | |
| National Popcorn Day | | |
| Confederate Heroes' Day | | |
| Brew A Potion Day | | |
| Artist As Outlaw Day | | |
| Good Memory Day | | |
| Martyrs’ Day | | |
| Heroes' Day | | |
| Heroes Day | | |
| Penguin Awareness Day | | |
| National Buttercrunch Day | | |
| National Disc Jockey Day | | |
| National Cheese Lover’s Day | | |
| Soup Swap Day | | |
| International Snowmobile Safety And Awareness Week | | |
| Take A Walk Outdoors Day | | |
| National Coffee Break Day | | |
| National Camcorder Day | | |
| International Day Of Acceptance | | |
| National Use Your Gift Card Day | | |
| Errol Barrow Day | | |
| Our Lady of Altagracia | | |
| Princess Ingrid Alexandra's day | | |
| National Hug Day | | |
| National Granola Bar Day | | |
| Squirrel Appreciation Day | | |
| World Religion Day | | |
| World Kiwanis Week | | |
| Hunt For Happiness Week | | |
| National Healthy Weight Week | | |
| National Fresh Squeezed Juice Week | | |
| National CRNA Week | | |
| National School Choice Week | | |
| World Snow Day | | |
| One-Liners Day | | |
| National Cheesy Socks Day | | |
| International Sweatpants Day | | |
| Plurinational State Foundation Day | | |
| Franco-German Day | | |
| Ukrainian Unity Day | | |
| National Hot Sauce Day | | |
| National Blonde Brownie Day | | |
| National Heroes Day | | |
| Wellington Anniversary Day | | |
| Answer Your Cat's Questions Day | | |
| Tax Identity Theft Week | | |
| National Polka Dot Day | | |
| Celebration Of Life Day | | |
| Community Manager Appreciation Day | | |
| National Handwriting Day | | |
| National Pie Day | | |
| National Rhubarb Pie Day | | |
| National Measure Your Feet Day | | |
| Speak Up And Succeed Day | | |
| National Compliment Day | | |
| Macintosh Computer Day | | |
| Unification Day | | |
| National Peanut Butter Day | | |
| Beer Can Appreciation Day | | |
| National Library Shelfie Day | | |
| Birthday of Imam Ali | | |
| National Lobster Thermidor Day | | |
| National Just Do It Day | | |
| Global Belly Laugh Day | | |
| National Talk Like A Grizzled Prospector Day | | |
| International Day Of Education | | |
| Betico Croes' Birthday | | |
| Revolution Day (January 25) | | |
| Tatiana Day | | |
| Burns Night | | |
| National Opposite Day | | |
| National Irish Coffee Day | | |
| Tu B'Shevat (Arbor Day) | | |
| Thaipusam | | |
| Thaipoosam Cavadee | | |
| Mahayana New Year | | |
| Observe The Weather Day | | |
| National IV Nurse Day | | |
| A Room Of One’s Own Day | | |
| Clashing Clothes Day | | |
| Republic Day | | |
| Australia Day | | |
| International Customs Day | | |
| Liberation Day | | |
| National Spouses Day | | |
| National Green Juice Day | | |
| National Peanut Brittle Day | | |
| National Big Wig Day | | |
| National Fun At Work Day | | |
| Toad Hollow Day Of Encouragement | | |
| International Day of Commemoration in Memory of the Victims of the Holocaust | | |
| Saint Dévote's Day | | |
| Spirituality Day/St Sava's Day | | |
| Remembrance Day for the Victims of National Socialism | | |
| e-Day | | |
| National Chocolate Cake Day | | |
| National Seed Swap Day | | |
| St Sava's Day | | |
| National Geographic Day | | |
| World Breast Pumping Day | | |
| Defender of the Fatherland Day | | |
| José Martôs Birthday Memorial | | |
| Army Day | | |
| National Kazoo Day | | |
| National Blueberry Pancake Day | | |
| Data Privacy Day | | |
| World Leprosy Day | | |
| National Catholic Schools Week | | |
| Meat Week | | |
| International Reducing CO2 Emissions Day | | |
| National Daisy Day | | |
| Rattlesnake Roundup Day | | |
| International Lego Day | | |
| Global Community Engagement Day | | |
| Kansas Day | | |
| St. Valero's Feast | | |
| National Puzzle Day | | |
| National Corn Chip Day | | |
| National Bubble Wrap Appreciation Day | | |
| Duarte´s Day | | |
| Northland Anniversary Day | | |
| Auckland Anniversary Day | | |
| Nelson Anniversary Day | | |
| National Cowboy Poetry Gathering Week | | |
| National Carnation Day | | |
| Freethinkers Day | | |
| Curmudgeons Day | | |
| The Three Holy Hierarchs | | |
| National Croissant Day | | |
| Plan for Vacation Day | | |
| Intimate Apparel Market Week | | |
| National Escape Day | | |
| National Draw A Dinosaur Day | | |
| Yodel For Your Neighbors Day | | |
| Independence Day | | |
| National Backward Day | | |
| National Hot Chocolate Day | | |
| National Inspire Your Heart With Art Day | | |
| Eat Brussel Sprouts Day | | |
| Scotch Tape Day | | |
| Brandy Alexander Day | | |
| Hell Is Freezing Over Day | | |
| Appreciate Your Social Security Check Day | | |
| National Gorilla Suit Day | | |
