| International Day for Mine Awareness and Assistance in Mine Action | |  |
| Peace Day | | |
| Independence Day | | |
| National Vitamin C Day | | |
| National Walk Around Things Day | | |
| National Hug a Newsperson Day | | |
| National School Librarian Day | | |
| National Chicken Cordon Bleu Day | | |
| Jeep 4×4 Day | | |
| Children's Day | | |
| Tell a Lie Day | | |
| Walk to Work Day | | |
| International Carrot Day | | |
| Poet In A Cupcake Day | | |
| World Rat Day | | |
| D.A.R.E. Day | | |
| First Contact Day | | |
| National Flash Drive Day | | |
| National Go For Broke Day | | |
| National Caramel Day | | |
| National Read a Road Map Day | | |
| National Raisin and Spice Bar Day | | |
| National Deep Dish Pizza Day | | |
| National Love Our Children Day | | |
| Tomb Sweeping Day (Qing Ming Jie) | | |
| Arbor Day | | |
| National Handmade Day | | |
| International Day Of Conscience | | |
| Hospital Admitting Clerks Day | | |
| National DIY Day | | |
| International Pillow Fight Day | | |
| International Firewalk Day | | |
| Tangible Karma Day | | |
| International Day of Sport for Development and Peace | | |
| Chakri Day | | |
| National Tartan Day | | |
| President Ntaryamira Day | | |
| National Sorry Charlie Day | | |
| New Beer’s Eve | | |
| National Caramel Popcorn Day | | |
| National Student-Athlete Day | | |
| National Teflon Day | | |
| A Drop of Water - A grain of Gold | | |
| Ramanavami | | |
| Geologists’ Day | | |
| National Siamese Cat Day | | |
| Army Day in United States | | |
| National Acai Bowl Day | | |
| Plan Your Epitaph Day | | |
| Motherhood and Beauty Day | | |
| Health Day | | |
| World Health Day | | |
| Day of Remembrance of the Victims of the Rwanda Genocide | | |
| Mozambican Woman's Day | | |
| Karume Day | | |
| Tutsi Genocide Memorial Day | | |
| National Beer Day | | |
| National Coffee Cake Day | | |
| National No Housework Day | | |
| National Girl Me Too Day | | |
| Hung Kings Festival | | |
| International Beaver Day | | |
| International Romani Day | | |
| National All is Ours Day | | |
| National Zoo Lovers Day | | |
| National Empanada Day | | |
| National Library Workers Day | | |
| Yom HaAliyah | | |
| Be Kind to Lawyers Day | | |
| Equal Pay Day | | |
| Draw A Picture Of A Bird Day | | |
| National Pygmy Hippo Day | | |
| Independence Restoration Day | | |
| Vimy Ridge Day | | |
| Constitution Day of the Republic of Kosovo | | |
| Martyrs' Day | | |
| National Cherish an Antique Day | | |
| National Name Yourself Day | | |
| National Winston Churchill Day | | |
| National Chinese Almond Cookie Day | | |
| National Former Prisoner of War Recognition Day | | |
| National Education and Sharing Day | | |
| The Day of Valor | | |
| National Unicorn Day | | |
| Siblings Day | | |
| National Cinnamon Crescent Day | | |
| National Farm Animals Day | | |
| National Alcohol Screening Day | | |
| Mahavir Jayanti | | |
| National Hug Your Dog Day | | |
| Golfer’s Day | | |
| International Safety Pin Day | | |
| Battle of Rivas | | |
| National Pet Day | | |
| National Barber Shop Quartet Day | | |
| National Submarine Day | | |
| National Eight Track Tape Day | | |
| National Cheese Fondue Day | | |
| The Day of Silence | | |
| World Parkinson’s Day | | |
| International Day of Human Space Flight | | |
| Grilled Cheese Day | | |
| Yuri's Night | | |
| National Big Wind Day | | |
| National Licorice Day | | |
| National Grilled Cheese Sandwich Day | | |
| Passover Eve | | |
| Children´s Day | | |
| God of Medicine's Birthday | | |
| Hanuman Jayanti | | |
| Walk On Your Wild Side Day | | |
| World Hamster Day | | |
| Deskfast Day | | |
| National Only Child Day | | |
| Unfairly Prosecuted Persons Day | | |
| National Scrabble Day | | |
| National Thomas Jefferson Day | | |
| National Peach Cobbler Day | | |
| National Make Lunch Count Day | | |
| Palm Sunday | | |
| Passover (First Day) | | |
| Thomas Jefferson's Birthday | | |
| Theravada New Year | | |
| Songkran | | |
| International FND Awareness Day | | |
| America Day | | |
| Ambedkar Jayanti | | |
| Look up the Sky Day | | |
| Cake and Cunnilingus Day | | |
| National Gardening Day | | |
| National Reach as High as You Can Day | | |
| National Pan American Day | | |
| National Ex Spouse Day | | |
| National Dolphin Day | | |
| National Pecan Day | | |
| Passover (2nd Day) | | |
| International Moment of Laughter Day | | |
| Vaisakhi / Baisakhi / Vishu | | |
| Vaisakhi | | |
| National Look Up At The Sky Day | | |
| World Chagas Disease Day | | |
| Songkran | | |
| Birth Date of Kim Il Sung | | |
| Father Damien Day | | |
| National Take a Wild Guess Day | | |
| National Rubber Eraser Day | | |
| National Titanic Remembrance Day | | |
| National Glazed Spiral Ham Day | | |
| Tax Day | | |
| Passover (3rd Day) | | |
| Declaration of Malacca as Historical City | | |
| Husband Appreciation Day | | |
| National Anime Day | | |
| National ASL Day | | |
| Songkran | | |
| International Microvolunteering Day | | |
| National That Sucks Day | | |
| National Orchid Day | | |
| National Eggs Benedict Day | | |
| National Wear Your Pajamas to Work Day | | |
| National Healthcare Decisions Day | | |
| National Bean Counter Day | | |
| Emancipation Day | | |
| Passover (4th Day) | | |
| Songkran observed | | |
| National Banana Day | | |
| Save The Elephant Day | | |
| National Librarian Day | | |
| Independence Day | | |
| Women's Rights Day | | |
| Herbalist Day | | |
| National Bat Appreciation Day | | |
| National Ellis Island Family History Day | | |
| National Haiku Poetry Day | | |
| National Cheeseball Day | | |
| National High Five Day | | |
| Get to Know Your Customers Day | | |
| Maundy Thursday | | |
| Flag Day | | |
| Passover (5th Day) | | |
| Blah Blah Blah Day | | |
| National Kickball Day | | |
| National Ford Mustang Day | | |
| College Student Grief Awareness Day | | |
| World Hemophilia Day | | |
| Nothing Like A Dame Day | | |
| Birthday of Guru Angad Dev | | |
| International Day for Monuments and Sites | | |
| Independence Day | | |
| National Lineman Appreciation Day | | |
| National Columnists’ Day | | |
| National Animal Crackers Day | | |
| Good Friday | | |
| Orthodox Good Friday | | |
| Passover (6th Day) | | |
| Coptic Good Friday | | |
| Ethiopian Good Friday | | |
| Fast and Prayer Day | | |
| National Piñata Day | | |
| Pet Owners Independence Day | | |
| Declaration of Independence | | |
| Bicycle Day | | |
| National Hanging Out Day | | |
| National Oklahoma City Bombing Commemoration Day | | |
| National Garlic Day | | |
| National Amaretto Day | | |
| National Auctioneers Day | | |
| Holy Saturday | | |
| Orthodox Holy Saturday | | |
| Passover (7th Day) | | |
| Landing of the 33 orientals | | |
| Passover (Last Day) | | |
| Coptic Holy Saturday | | |
| Birthday of King Mswati III | | |
| National Rice Ball Day | | |
| Chinese Language Day | | |
| Lima Bean Respect Day | | |
| National Cheddar Fries Day | | |
| National Look Alike Day | | |
| National Pineapple Upside Down Cake Day | | |
| Easter | | |
| Passover (Last Day in Diaspora) | | |
| Orthodox Easter | | |
| Matsu's Birthday | | |
| Coptic Easter | | |
| Ethiopian Easter | | |
| 420 Day | | |
| Administrative Professionals Week | | |
| Tiradentes Day | | |
| San Jacinto Day | | |
| National Kindergarten Day | | |
| National Chocolate Covered Cashews Day | | |
| National Yellow Bat Day | | |
| Sechseläuten | | |
| Easter Monday | | |
| Orthodox Easter Monday | | |
| St. George's Day | | |
| Patriot's Day | | |
| Queen's Birthday | | |
| Spring Festival | | |
| Family Day | | |
| Dyngus day | | |
| National Tea Day | | |
| National Bulldogs Are Beautiful Day | | |
| World Creativity And Innovation Day | | |
| National Holocaust, World War II Genocide and other Fascist Crimes Victims Remembrance Day | | |
| Oklahoma Day | | |
| National Girl Scout Leader’s Day | | |
| National Jelly Bean Day | | |
| Easter Tuesday | | |
| Southland Anniversary Day | | |
| Earth Day | | |
| Orthodox Easter Tuesday (banks only) | | |
| Stephen Lawrence Day | | |
| School Bus Drivers Day | | |
| National Beagle Day | | |
| International Mother Earth Day | | |
| St. George's Day | | |
| World Book and Copyright Day | | |
| English Language Day | | |
| Language Day | | |
| Day of Turks | | |
| German Beer Day | | |
| National Sovereignty and Children's Day | | |
| Lover's Day | | |
| Castile and León Day | | |
| National Talk Like Shakespeare Day | | |
| National Picnic Day | | |
| National Take a Chance Day | | |
| National Cherry Cheesecake Day | | |
| National Lost Dogs Awareness Day | | |
| Administrative Professionals Day | | |
| Yom HaShoah | | |
| Day of Aragón | | |
| Spanish Language Day | | |
| World Table Tennis Day | | |
| Action Day for Tolerance and Respect between People | | |
| Genocide Remembrance Day | | |
| Concord Day | | |
| National Pigs in a Blanket Day | | |
| Take Our Daughters and Sons to Work Day | | |
| National Poem In Your Pocket Day | | |
| Martyrdom of Imam Sadeq | | |
| Girls' Day - Career Information Day | | |
| First Day of Summer | | |
| Gathering Of Nations | | |
| Yom HaShoah | | |
| International Girls In ICT Day | | |
| Scream Day | | |
| International Day Of Multilateralism And Diplomacy For Peace | | |
| Love Your Thighs Day | | |
| World Malaria Day | | |
| Liberation Day | | |
| The Feast of St Mark | | |
| Liberty Day | | |
| Sinai Liberation Day | | |
| Chosun People's Army Foundation Day | | |
| National Flag Day | | |
| National Telephone Day | | |
| National East Meets West Day | | |
| National Zucchini Bread Day | | |
| National DNA Day | | |
| National Hug a Plumber Day | | |
| National Hairball Awareness Day | | |
| Arbor Day | | |
| ANZAC Day | | |
| Yom HaShoah | | |
| National Lingerie Day | | |
| World Penguin Day | | |
| International Delegate’s Day | | |
| Intellectual Property Day | | |
| World Intellectual Property Day | | |
| Secretaries' Day | | |
| Day of Remembrance of the Chernobyl Tragedy | | |
| Union Day | | |
| National Audubon Day | | |
| National Dissertation Day | | |
| National Richter Scale Day | | |
| National Kids and Pets Day | | |
| National Pretzel Day | | |
| National Help a Horse Day | | |
| National Rebuilding Day | | |
| National Sense of Smell Day | | |
| National Pool Opening Day | | |
| National Kiss of Hope Day | | |
| Confederate Heroes' Day | | |
| Children´s Day | | |
| International Chernobyl Disaster Remembrance Day | | |
| Birthday of the Sultan of Terengganu | | |
| Alien Day | | |
| World Veterinary Day | | |
| Get Organized Day | | |
| National Go Birding Day | | |
| Independent Bookstore Day | | |
| World Burlesque Day | | |
| International Marconi Day | | |
| Hug An Australian Day | | |
| King's Day | | |
| State Flag Day | | |
| Independence Day | | |
| Day of Uprising Against Occupation | | |
| Freedom Day | | |
| National Babe Ruth Day | | |
| National Tell a Story Day | | |
| National Prime Rib Day | | |
| National Devil Dog Day | | |
| National Pet Parents Day | | |
| Turkmen Racing Horse Festival | | |
| World Pinhole Photography Day | | |
| Morse Code Day | | |
| World Tapir Day | | |
| Marine Mammal Rescue Day | | |
| National Heroes Day | | |
| World Day for Safety and Health at Work | | |
| Afghan Victory Day | | |
| Workers' Memorial Day | | |
| National Superhero Day | | |
| National Blueberry Pie Day | | |
| National Great Poetry Reading Day | | |
| National BraveHearts Day | | |
| Confederate Memorial Day | | |
| St. Pierre Chanel Day | | |
| Sechseläuten | | |
| Freedom Day observed | | |
| Save The Frogs Day | | |
| Biological Clock Day | | |
| National Cubicle Day | | |
| Global Pay It Forward Day | | |
| Clean Comedy Day | | |
| Day of Trees | | |
| International Dance Day | | |
| National Peace Rose Day | | |
| National Zipper Day | | |
| National Shrimp Scampi Day | | |
| Shōwa Day | | |
| World Wish Day | | |
| We Jump The World Day | | |
| St. James the Great Day | | |
| International Jazz Day | | |
| Carnival Day | | |
| Liberation Day/Reunification Day | | |
| Education Day | | |
| National Bubble Tea Day | | |
| National Sarcoidosis Day | | |
| National Military Brats Day | | |
| National PrepareAthon! Day | | |
| National Honesty Day | | |
| National Adopt a Shelter Pet Day | | |
| National Bugs Bunny Day | | |
| National Hairstylist Appreciation Day | | |
| National Oatmeal Cookie Day | | |
| National Raisin Day | | |
| Children's Day | | |
| Yom HaZikaron (Memorial Day) | | |
| Walpurgis Night | | |
| International Guide Dog Day | | |
| Stop Food Waste Day | | |
| Feast of St Joseph the Worker | | |
| Workers' Day | | |
| Labor Day / May Day | | |
| Unity Day | | |
| Loyalty Day | | |
| Labor Day | | |
| Maharashtra Day | | |
| National Mother Goose Day | | |
| National Chocolate Parfait Day | | |
| Law Day | | |
| School Principals’ Day | | |
| Silver Star Service Banner Day | | |
| National Day of Reason | | |
| World Password Day | | |
| National Day of Prayer | | |
| Yom Ha'atzmaut | | |
| Agriculture and Labor Day | | |
| Lei Day | | |
| May Day | | |
| Constitution Day | | |
| Spring and Labor Day | | |
| Labor and Solidarity Day | | |
| Constituent Assembly Convocation Day | | |
| Labor day | | |
| May 1st | | |
| Sturge-Weber Syndrome Awareness | | |
| National Hamburger Month | | |
| National Executive Coaching Day | | |
| National Purebred Dog Day | | |
| Global Love Day | | |
| Lupus Awareness Month | | |
| National Blood Pressure Education Month | | |
| National Asparagus Month | | |
| Skin Cancer Awareness Month | | |
| National Inventor’s Month | | |
| National Photography Month | | |
| International Drum Month | | |
| National Bike Month | | |
| National Deck Safety Month | | |
| National Military Appreciation Month | | |
| National Moving Month | | |
| Celiac Disease Awareness Month | | |
| National Get Caught Reading Month | | |
| National Stroke Awareness Month | | |
| National Mental Health Awareness Month | | |
| Motorcycle Safety Awareness Month | | |
| National Brain Cancer And Brain Tumor Awareness Month | | |
| National Gardening Week | | |
| Therapeutic Massage Awareness Day | | |
| National Egg Month | | |
| National Salsa Month | | |
| National Salad Month | | |
| National Barbecue Month | | |
| National Strawberry Month | | |
| National Cystic Fibrosis Awareness Month | | |
| Correct Your Posture Month | | |
| National Chamber Music Month | | |
| National Mediterranean Diet Month | | |
| Older Americans Month | | |
| Better Speech And Language Month | | |
| National Foster Care Month | | |
| National Water Safety Month | | |
| National Wildfire Awareness Month | | |
| American Cheese Month | | |
| Date Your Mate Month | | |
| New Home Owners Day | | |
| Day of Madrid | | |
| National Truffle Day | | |
| National Life Insurance Day | | |
| National Space Day | | |
| School Lunch Hero Day | | |
| No Pants Day | | |
| World Tuna Day | | |
| Spring and Labor Day Holiday | | |
| Labor Day observed | | |
| Labor Day / May Day (2nd Day) | | |
| Day of the Flag | | |
| Labor Day (2nd Day) | | |
| Baby Day | | |
| National Brothers And Sisters Day | | |
| International Tuba Day | | |
| Constitution Memorial Day | | |
| Cross Day | | |
| World Press Freedom Day | | |
| Constitution Day | | |
| National Lumpy Rug Day | | |
| National Garden Meditation Day | | |
| National Specially-Able Pets Day | | |
| National Two Different Colored Shoes Day | | |
| National Paranormal Day | | |
| National Chocolate Custard Day | | |
| National Raspberry Pop Over Day | | |
| National Textiles Day | | |
| National Fitness Day | | |
| National Scrapbook Day | | |
| National Homebrew Day | | |
| Join Hands Day | | |
| National Bombshells’ Day | | |
| National Start Seeing Monarchs Day | | |
| Free Comic Book Day | | |
| National Lemonade Day | | |
| National Explosive Ordnance Disposal (EOD) Day | | |
| Herb Day | | |
| Astronomy Day | | |
| Beer Pong Day | | |
| Wildfire Community Preparedness Day | | |
| Greenery Day | | |
| Literary Day | | |
| Anniversary of the Decease of M. R. ŝtefánika | | |
| Independence Restoration Day | | |
| Youth Day | | |
| Cassinga Day | | |
| Kent State Shootings Remembrance | | |
| Rhode Island Independence Day | | |
| National Star Wars Day | | |
| National Weather Observers Day | | |
| National Renewal Day | | |
| National Orange Juice Day | | |
| National Candied Orange Peel Day | | |
| National Infertility Survival Day | | |
| Special working day | | |
| Saint Florian's Day | | |
| Mother's Day | | |
| Remembrance Day | | |
| Coronation Day | | |
| 45 Day | | |
| World Laughter Day | | |
| International Firefighters’ Day | | |
| National Pet Week | | |
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