| Action Day for Tolerance and Respect between People | |  |
| Genocide Remembrance Day | | |
| Concord Day | | |
| National Pigs in a Blanket Day | | |
| National Hairball Awareness Day | | |
| Arbor Day | | |
| Scream Day | | |
| International Day Of Multilateralism And Diplomacy For Peace | | |
| 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 Rebuilding Day | | |
| National Sense of Smell Day | | |
| National Pool Opening Day | | |
| National Kiss of Hope Day | | |
| Children´s Day | | |
| ANZAC Day | | |
| National Lingerie Day | | |
| World Penguin Day | | |
| World Veterinary Day | | |
| National Go Birding Day | | |
| Independent Bookstore Day | | |
| International Marconi 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 Pet Parents Day | | |
| Confederate Heroes' Day | | |
| International Chernobyl Disaster Remembrance Day | | |
| Birthday of the Sultan of Terengganu | | |
| Turkmen Racing Horse Festival | | |
| Hung Kings Festival | | |
| World Pinhole Photography Day | | |
| Alien Day | | |
| Get Organized Day | | |
| World Burlesque 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 | | |
| Confederate Memorial Day | | |
| Confederate Heroes' Day observed | | |
| ANZAC Day | | |
| ANZAC Day observed | | |
| 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 | | |
| St. Pierre Chanel Day | | |
| Save The Frogs Day | | |
| School Bus Drivers 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 | | |
| International Guide Dog Day | | |
| World Wish Day | | |
| Stop Food Waste 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 | | |
| National Poem In Your Pocket Day | | |
| Children's Day | | |
| Walpurgis Night | | |
| 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 Space Day | | |
| School Lunch Hero Day | | |
| No Pants Day | | |
| Agriculture and Labor Day | | |
| Lei Day | | |
| May Day | | |
| Great Prayer Day | | |
| Constitution Day | | |
| Spring and Labor Day | | |
| God of Medicine's Birthday | | |
| Labor and Solidarity Day | | |
| Constituent Assembly Convocation Day | | |
| Labor day | | |
| May 1st | | |
| Sturge-Weber Syndrome Awareness | | |
| National Hamburger Month | | |
| Wesak - Buddha Day | | |
| Buddha Purnima | | |
| Buddha Purnima/Vesak | | |
| National Executive Coaching Day | | |
| National Purebred Dog Day | | |
| Global Love Day | | |
| International Tuba 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 | | |
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