| Constitution Day | |  |
| National Clean Up Your Room Day | | |
| National Lipid Day | | |
| National Shrimp Day | | |
| National Birth Mother’s Day | | |
| National Babysitter’s Day | | |
| National Dog Mom’s Day | | |
| National Train Day | | |
| National Archery Day | | |
| Cornelia De Lange Syndrome Awareness Day | | |
| Stamp Out Hunger Food Drive Day | | |
| Mother's Day | | |
| Confederate Memorial Day | | |
| World Migratory Bird Day | | |
| Liberation Day (only Sark) | | |
| Monarchy Day | | |
| World Lupus Day | | |
| National Miniature Golf Day | | |
| International Day Of Argania | | |
| World Belly Dance Day | | |
| Mother Ocean Day | | |
| National Windmill Day | | |
| One Day Without Shoes Day | | |
| World Buckfast Day | | |
| National Eat What You Want Day | | |
| National Foam Rolling Day | | |
| National Twilight Zone Day | | |
| Mother's Day | | |
| Day of the National Emblem and Flag of Belarus | | |
| Father's Day | | |
| World Ego Awareness Day | | |
| International Nurses Day | | |
| National Limerick Day | | |
| National Odometer Day | | |
| National Nutty Fudge Day | | |
| National Fibromyalgia Awareness Day | | |
| National Women’s Checkup Day | | |
| Mother's Day | | |
| Gospel Day | | |
| St. Andrew's Day | | |
| Wesak - Buddha Day | | |
| Buddha Purnima | | |
| Buddha Purnima/Vesak | | |
| Vesak Full Moon Poya Day | | |
| International Day Of Plant Health | | |
| National Crouton Day | | |
| National Frog Jumping Day | | |
| National Apple Pie Day | | |
| National Fruit Cocktail Day | | |
| World Cocktail Day | | |
| International Hummus Day | | |
| Leprechaun Day | | |
| Top Gun Day | | |
| Independence Day | | |
| National Unification Day | | |
| Kamuzu Day | | |
| National Decency Day | | |
| National Dance Like a Chicken Day | | |
| National Buttermilk Biscuit Day | | |
| National Receptionists Day | | |
| National Third Shift Workers Day | | |
| Donate A Day’s Wages To Charity Day | | |
| National Root Canal Appreciation Day | | |
| World Facilities Management Day | | |
| Independence Day Holiday | | |
| Teachers' Day | | |
| Family Day | | |
| International Day of Families | | |
| Peace Officers Memorial Day | | |
| Feast Day of St Isidore | | |
| National Chocolate Chip Day | | |
| National Nylon Stocking Day | | |
| Bring Flowers To Someone Day | | |
| National Notebook Day | | |
| National Straw Hat Day | | |
| National Police Week | | |
| Global Accessibility Awareness Day | | |
| International Vascular Birthmarks Awareness Day | | |
| SPLA Day | | |
| Honor Our LGBT Elders Day | | |
| National Do Something Good for Your Neighbor Day | | |
| National Love a Tree Day | | |
| National Piercing Day | | |
| National Sea Monkey Day | | |
| National Biographer’s Day | | |
| National Coquilles Saint Jacques Day | | |
| Bike to Work Day | | |
| National Endangered Species Day | | |
| National Pizza Party Day | | |
| NASCAR Day | | |
| Lag B'Omer | | |
| National Defense Transportation Day | | |
| Great Prayer Day | | |
| Horse Rescue Day | | |
| National Barbecue Day | | |
| National Waiters Day | | |
| Drawing Day | | |
| International Day Of Light | | |
| International Virtual Assistants Day | | |
| Shades Day | | |
| International Day Of Living Together In Peace | | |
| World Telecommunication and Information Society Day | | |
| Constitution Day | | |
| 17 May Constitution Day (1814) | | |
| Galicia Literature Day | | |
| Liberation Day | | |
| National Pack Rat Day | | |
| National Cherry Cobbler Day | | |
| National Graduation Tassel Day | | |
| National Walnut Day | | |
| National Learn to Swim Day | | |
| Armed Forces Day | | |
| Europe Day | | |
| World Whisky Day | | |
| National Work From Home Day | | |
| World Fiddle Day | | |
| National Pinot Grigio Day | | |
| World Neurofibromatosis Awareness Day | | |
| Plant A Lemon Tree Day | | |
| Day of Revival, Unity, and the Poetry of Magtymguly | | |
| Flag Day/University Day | | |
| International Museum Day | | |
| Battle of Las Piedras | | |
| National HIV Vaccine Awareness Day | | |
| National Visit Your Relatives Day | | |
| National No Dirty Dishes Day | | |
| National Cheese Soufflé Day | | |
| Take Your Parents To The Playground Day | | |
| World Baking Day | | |
| International Heritage Breeds Week | | |
| Commemoration of Atatürk, Youth and Sports Day | | |
| National Devil’s Food Cake Day | | |
| Victoria Day | | |
| National Patriots' Day | | |
| Discovery Day | | |
| National May Ray Day | | |
| Italian Beef Week | | |
| Restoration of Independence Day | | |
| National Day | | |
| National Be a Millionaire Day | | |
| National Pick Strawberries Day | | |
| National Rescue Dog Day | | |
| National Quiche Lorraine Day | | |
| World Autoimmune / Autoinflammatory Arthritis Day | | |
| Day of Remembrance | | |
| World Bee Day | | |
| Weights & Measures Day | | |
| World Day for Cultural Diversity for Dialogue and Development | | |
| Navy Day | | |
| Independence Day | | |
| Talk Like Yoda Day | | |
| Saint Helena's Day | | |
| National American Red Cross Founder’s Day | | |
| National Waitstaff Day | | |
| National Strawberries and Cream Day | | |
| National Memo Day | | |
| Emergency Medical Services for Children Day | | |
| International Tea Day | | |
| I Need A Patch For That Day | | |
| World Meditation Day | | |
| National Numeracy Day | | |
| Rapture Party Day | | |
| International Customer Support Day | | |
| International Day for Biological Diversity | | |
| Unity Day | | |
| Independence Day (2nd Day) | | |
| National Maritime Day | | |
| National Craft Distillery Day | | |
| National Solitaire Day | | |
| National Buy a Musical Instrument Day | | |
| National Vanilla Pudding Day | | |
| Harvey Milk Day | | |
| World Goth Day | | |
| Sherlock Holmes Day | | |
| International Day to End Obstetric Fistula | | |
| Labor Day / May Day | | |
| Constitution Day | | |
| World Turtle Day | | |
| National Lucky Penny Day | | |
| National Taffy Day | | |
| National Don’t Fry Day | | |
| Vlach’s National Day (for Vlach community) | | |
| National Title Track Day | | |
| Culture and Literacy Day | | |
| The Battle of Pichincha | | |
| Independence Day | | |
| National Aviation Maintenance Technician Day | | |
| Brother’s Day | | |
| National Scavenger Hunt Day | | |
| National Escargot Day | | |
| Commonwealth Day | | |
| Saints Cyril and Methodius' Day | | |
| International Tiara Day | | |
| National Asparagus Day | | |
| National Day/May 1810 Revolution | | |
| Independence Day | | |
| Liberation and Resistance Day | | |
| Sing Out Day | | |
| Towel Day | | |
| National Missing Children's Day | | |
| National Wine Day | | |
| National Tap Dance Day | | |
| National Brown-Bag It Day | | |
| Mother's Day | | |
| Carpet Day | | |
| Dniester Day | | |
| Cultural Workers and Folk Artists Day | | |
| Kiev Day | | |
| Africa Day | | |
| Geek Pride Day | | |
| Independence Day | | |
| National Sorry Day | | |
| World Lindy Hop Day | | |
| National Blueberry Cheesecake Day | | |
| Spring Bank Holiday | | |
| Day off for Commonwealth Day | | |
| Memorial Day | | |
| Jefferson Davis' Birthday | | |
| Yom Yerushalayim (Jerusalem Day) | | |
| Late May Bank Holiday | | |
| Mother's Day | | |
| Africa Day | | |
| Savitri Puja | | |
| National Paper Airplane Day | | |
| World Dracula Day | | |
| Sun Screen Day | | |
| National Cellophane Tape Day | | |
| National Grape Popsicle Day | | |
| Mother's Day | | |
| Children's Day | | |
| Republic Day | | |
| Hamburger Day | | |
| Derg Downfall Day | | |
| National Brisket Day | | |
| National Senior Health & Fitness Day | | |
| National Flip Flop Day | | |
| Menstrual Hygiene Day | | |
| Amnesty International Day | | |
| International Day of United Nations Peacekeepers | | |
| Put a Pillow on Your Fridge Day | | |
| National Paperclip Day | | |
| National Coq Au Vin Day | | |
| Ascension Day | | |
| Father's Day | | |
| Orthodox Ascension Day | | |
| National Biscuit Day | | |
| International Everest Day | | |
| Learn About Composting Day | | |
| Statehood Day | | |
| Anguilla Day | | |
| Day of the Canary Islands | | |
| National Creativity Day | | |
| National Water a Flower Day | | |
| National Hole In My Bucket Day | | |
| National Mint Julep Day | | |
| Loomis Day | | |
| National Heat Awareness Day | | |
| Mother's Day | | |
| Indian Arrival Day | | |
| National Heroes Day | | |
| Bermuda Day | | |
| Harvest Festival | | |
| Martyrdom of Guru Arjan Dev Sahib | | |
| World No Tobacco Day | | |
| Royal Brunei Armed Forces Day | | |
| Day of Castile-La Mancha | | |
| Autonomous Vehicle Day | | |
| National Save Your Hearing Day | | |
| National Speak in Sentences Day | | |
| National Macaroon Day | | |
| National Smile Day | | |
| Necrotizing Fasciitis Awareness Day | | |
| Dragon Boat Festival | | |
| Harvest Festival Day 2 | | |
| Web Designer Day | | |
| President's Day | | |
| Global Day of Parents | | |
| Madaraka Day | | |
| Statehood Day | | |
| World Reef Awareness Day | | |
| National Olive Day | | |
| National Heimlich Maneuver Day | | |
| National Go Barefoot Day | | |
| National Nail Polish Day | | |
| National Say Something Nice Day | | |
| National Penpal Day | | |
| National Hazelnut Cake Day | | |
| National Cancer Survivors Day | | |
| Father's Day | | |
| Independence Day | | |
| Children's Day | | |
| Erev Shavuot | | |
| Gawai Dayak | | |
| Fathers' Day | | |
| Dinosaur Day | | |
| National Rose Month | | |
| World Milk Day | | |
| International Tabletop Day | | |
| National Adopt A Cat Month | | |
| National Iced Tea Month | | |
| National Papaya Month | | |
| Audiobook Month | | |
| National Pollinators Month | | |
| National Dairy Month | | |
| National Camping Month | | |
| Men’s Health Month | | |
| National Candy Month | | |
| Turkey Lovers Month | | |
| National Fresh Fruit And Vegetables Month | | |
| Care For Your Grandparents Month | | |
| International Mud Month | | |
| National Great Outdoors Month | | |
| National Zoo And Aquarium Month | | |
| National Soul Food Month | | |
| National Homeownership Month | | |
| Republic Day | | |
| Isabel Province Day | | |
| National Rotisserie Chicken Day | | |
| National Rocky Road Day | | |
| National Bubba Day | | |
| National Leave The Office Early Day | | |
| Shavuot | | |
| Jefferson Davis' Birthday | | |
| Ascension Day | | |
| Western Australia Day | | |
| Reconciliation Day | | |
| Queen's Birthday | | |
| Gawai Dayak observed | | |
| Gawai Dayak Holiday | | |
| June Bank Holiday | | |
| Opium Suppression Movement Day | | |
| European Bicycle Day | | |
| Martyr's Day | | |
| National Egg Day | | |
| National Repeat Day | | |
| National Chocolate Macaroons Day | | |
| Jefferson Davis' Birthday | | |
| Chimborazo Day | | |
| World Bicycle Day | | |
| World Cider Day | | |
| Insect Repellent Awareness Day | | |
| International Day of Innocent Children Victims of Aggression | | |
| National Cheese Day | | |
| National Old Maids Day | | |
| National Cognac Day | | |
| National SAFE Day | | |
| Global Running Day | | |
| Emancipation Day | | |
| Hug Your Cat Day | | |
| World Environment Day | | |
| President´s Day | | |
| Constitution Day | | |
| National Gingerbread Day | | |
| National Veggie Burger Day | | |
| National Moonshine Day | | |
| Hot Air Balloon Day | | |
| National Sausage Roll Day | | |
| HIV Long-Term Survivors Day | | |
| International Day For The Fight Against Illegal, Unreported And Unregulated Fishing | | |
| National Coworking Day | | |
| Memorial Day | | |
| National day | | |
| Queensland Day | | |
| Visually Impaired People Day | | |
| Chosun Children's Union Foundation Day | | |
| D-Day | | |
| National Eyewear Day | | |
| National Higher Education Day | | |
| National Gardening Exercise Day | | |
| National Yo-Yo Day | | |
| National Drive In Movie Day | | |
| National Applesauce Cake Day | | |
| National Donut Day | | |
| Randol Fawkes Labour Day | | |
| Day of Arafat | | |
| Sacrifice Feast Eve | | |
| T. T. Bank Holiday | | |
| National Caves And Karst Day | | |
| National Fish And Chip Day | | |
| Russian Language Day | | |
| Anniversary of the Memorandum of the Slovak Nation | | |
| Sette Giugno | | |
| Flag Day | | |
| Dissolution of union with Sweden (1905) | | |
| National Boone Day | | |
| National Chocolate Ice Cream Day | | |
| National VCR Day | | |
| National Black Bear Day | | |
| National Bubbly Day | | |
| National Prairie Day | | |
| National Trails Day | | |
| Wear BLUE Day | | |
| Eid al-Adha | | |
| The Yang di-Pertuan Agong's Birthday | | |
| Special working day | | |
| Pentecost Eve | | |
| Tabaski | | |
| World Food Safety Day | | |
| Love Island Day | | |
| World Oceans Day | | |
| Temotu Province Day | | |
| National Best Friends Day | | |
| National Name Your Poison Day | | |
| National Upsy Daisy Day | | |
| National Children’s Day | | |
| Pentecost / Whit Sunday | | |
| Eid al-Adha holiday | | |
| Orthodox Pentecost | | |
| Day of Murcia | | |
| Day of La Rioja | | |
| National Heroes Day | | |
| National Donald Duck Day | | |
| National Strawberry Rhubarb Pie Day | | |
| Whit Monday | | |
| Sovereign's Birthday | | |
| Queen's Birthday | | |
| Eid al-Adha holiday | | |
| Orthodox Pentecost Monday | | |
| Holy Spirit Monday | | |
| Orthodox Pentecost holiday | | |
