| 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 | | |
| National Pet Parents Day | | |
| Passover (6th Day) | | |
| St. Pierre Chanel Day | | |
| Turkmen Racing Horse Festival | | |
| World Pinhole Photography Day | | |
| 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 | | |
| Confederate Memorial Day | | |
| Passover (7th Day) | | |
| Passover (Last 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 | | |
| Passover (Last Day in Diaspora) | | |
| 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 | | |
| Agriculture and Labor Day | | |
| Lei Day | | |
| May Day | | |
| Constitution Day | | |
| Spring and Labor Day | | |
| Matsu's Birthday | | |
| Labor and Solidarity Day | | |
| Constituent Assembly Convocation 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 Day of Reason | | |
| World Password Day | | |
| National Day of Prayer | | |
| 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) | | |
| National Skilled Trades Day | | |
| Baby Day | | |
| National Brothers And Sisters 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 Space Day | | |
| School Lunch Hero Day | | |
| No Pants Day | | |
| Orthodox Good Friday | | |
| Spring and Labor Day Holiday | | |
| Coptic Good Friday | | |
| Ethiopian Good Friday | | |
| International Tuba 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 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 | | |
| Orthodox Holy Saturday | | |
| National Explosive Ordnance Disposal (EOD) Day | | |
| Martyrdom of Imam Sadeq | | |
| Saint Florian's Day | | |
| Remembrance Day | | |
| Coptic Holy Saturday | | |
| Herb Day | | |
| Coronation Day | | |
| 45 Day | | |
| Beer Pong Day | | |
| International Firefighters’ Day | | |
| Wildfire Community Preparedness Day | | |
| Senior Citizens Day | | |
| Constitution Day of the Kyrgyz Republic | | |
| Liberation Day | | |
| Cinco de Mayo | | |
| Freedom Day | | |
| National Astronaut Day | | |
| National Cartoonists Day | | |
| National Silence the Shame Day | | |
| National Totally Chipotle Day | | |
| National Hoagie Day | | |
| National Infertility Survival Day | | |
| Orthodox Easter | | |
| Arrival Day | | |
| Children's Day | | |
| Mother's Day | | |
| Yom HaShoah | | |
| Coptic Easter | | |
| Ethiopian Easter | | |
| Nail Day | | |
| World Laughter Day | | |
| Revenge Of The Fifth | | |
| International Midwives’ Day | | |
| National Pet Week | | |
| Hug A Shed And Take A Selfie Day | | |
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