| 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 | |  |