| Feast of St Joseph the Worker | |  |
| Workers' Day | | |
| Labor Day / May Day | | |
| Unity Day | | |
| Loyalty Day | | |
| Labor Day | | |
| May Day | | |
| Labor Day | | |
| Labor and Solidarity Day | | |
| Spring and Labor Day | | |
| Imam Mahdi's birthday | | |
| May 1st | | |
| Labor day | | |
| Agriculture and Labor Day | | |
| Maharashtra Day | | |
| National Mother Goose Day | | |
| National Chocolate Parfait Day | | |
| Law Day | | |
| School Principals’ Day | | |
| Silver Star Service Banner Day | | |
| Shab e-Barat | | |
| Lei Day | | |
| Constitution Day | | |
| Majdoor Divas | | |
| Constituent Assembly Convocation Day | | |
| Lailat al Bara'ah | | |
| Sturge-Weber Syndrome Awareness | | |
| National Hamburger Month | | |
| National Executive Coaching Day | | |
| National Purebred Dog Day | | |
| World Asthma 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 | | |
| Labor Day Holiday | | |
| Labor Day observed | | |
| Labor Day (2nd Day) | | |
| Labor Day / May Day (2nd Day) | | |
| National Truffle Day | | |
| National Life Insurance Day | | |
| World Tuna Day | | |
| Birth Anniversary of Third Druk Gyalpo | | |
| Imam Mahdi's birthday | | |
| Spring and Labor Day Holiday | | |
| Day of the Flag | | |
| Baby Day | | |
| National Brothers And Sisters Day | | |
| Constitution Memorial Day | | |
| Cross Day | | |
| World Press Freedom Day | | |
| Constitution Day | | |
| Lag B'Omer | | |
| National Day of Prayer | | |
| 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 | | |
| Royal Plowing Ceremony | | |
| 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 | | |
| Remembrance Day | | |
| No Pants Day | | |
| National Star Wars Day | | |
| National Weather Observers Day | | |
| National Renewal Day | | |
| National Orange Juice Day | | |
| National Candied Orange Peel Day | | |
| Saint Florian's Day | | |
| 45 Day | | |
| International Tuba Day | | |
| International Firefighters’ Day | | |
| Senior Citizens Day | | |
| Constitution Day of the Kyrgyz Republic | | |
| Liberation Day | | |
| Cinco de Mayo | | |
| Freedom Day | | |
| National Explosive Ordnance Disposal (EOD) Day | | |
| Arrival Day | | |
| Children's Day | | |
| World Naked Gardening Day | | |
| National Astronaut Day | | |
| National Cartoonists Day | | |
| National Silence the Shame Day | | |
| National Totally Chipotle Day | | |
| National Hoagie Day | | |
| Free Comic Book Day | | |
| Special Working Day | | |
| Liberation Day | | |
| Nail Day | | |
| Beer Pong Day | | |
| Revenge Of The Fifth | | |
| International Midwives’ Day | | |
| Hug A Shed And Take A Selfie Day | | |
| Martyrs' Day | | |
| Day of Gorans | | |
| National Nurses Day | | |
| Mother's Day | | |
| St. George's Day | | |
| International No Diet Day | | |
| National Beverage Day | | |
| National Crepe Suzette Day | | |
| National Nurses Week | | |
| World Laughter Day | | |
| No Homework Day | | |
| National Tourist Appreciation Day | | |
| Soldiers' Day | | |
| Defender of the Fatherland Day | | |
| Labor Day | | |
| May Day | | |
| Early May Bank Holiday | | |
| National Packaging Design Day | | |
| National Paste-Up Day | | |
| National Barrier Awareness Day | | |
| National Roast Leg of Lamb Day | | |
| Labor Day / May Day | | |
| Labor Day | | |
| Pahang State Holiday | | |
| Children's Day observed | | |
| St. George's Day observed | | |
| National Cosmopolitan Day | | |
| National Tourism Day | | |
| Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War | | |
| Parents' Day | | |
| World Ovarian Cancer Day | | |
| Day of liberation | | |
| Truman Day | | |
| Victory Day | | |
| Victory Day | | |
| Primary Election Day West Virginia | | |
| Matsu's Birthday | | |
| National Coconut Cream Pie Day | | |
| National Have A Coke Day | | |
| Primary Election Day | | |
| Defender of the Fatherland Day (extra holiday) | | |
| No Socks Day | | |
| World Donkey Day | | |
| Iris Day | | |
| Free Trade Day | | |
| Europe Day | | |
| Victory Day | | |
| Liberation Day | | |
| Victory Day / Memorial Day | | |
| Remembrance Day | | |
| Europe Day | | |
| National Lost Sock Memorial Day | | |
| National Moscato Day | | |
| National Butterscotch Brownie Day | | |
| National Sleepover Day | | |
| Birthday of Ravindranath | | |
| General Elections | | |
| Liberation Day (except Alderney and Sark) | | |
| Donate A Day’s Wages To Charity Day | | |
| Constitution Day | | |
| Ascension Day | | |
| Mother's Day | | |
| State Holiday | | |
| National Clean Up Your Room Day | | |
| National Lipid Day | | |
| National Shrimp Day | | |
| Confederate Memorial Day | | |
| Ascension Day of Jesus Christ | | |
| General Elections Holiday | | |
| Father's Day | | |
| Liberation Day (only Sark) | | |
| Monarchy Day | | |
| World Lupus Day | | |
| International Day Of Argania | | |
| Mother Ocean Day | | |
| One Day Without Shoes Day | | |
| National Eat What You Want Day | | |
| National Foam Rolling Day | | |
| National Twilight Zone Day | | |
| Military Spouse Appreciation Day | | |
| General Elections Holiday | | |
| National Public Gardens Day | | |
| World Ego Awareness Day | | |
| World Migratory Bird Day | | |
| International Nurses Day | | |
| National Limerick Day | | |
| National Odometer Day | | |
| National Nutty Fudge Day | | |
| National Fibromyalgia Awareness Day | | |
| St. Andrew's Day | | |
| International Day Of Plant Health | | |
| World Belly Dance Day | | |
| National Windmill Day | | |
| Mother's Day | | |
| Father's Day | | |
| Day of the National Emblem and Flag of Belarus | | |
| Yom Yerushalayim (Jerusalem Day) | | |
| National Crouton Day | | |
| National Frog Jumping Day | | |
| National Apple Pie Day | | |
| National Fruit Cocktail Day | | |
| King's Birthday (Day 1) | | |
| General Elections Holiday | | |
| World Cocktail Day | | |
| International Hummus Day | | |
| Leprechaun Day | | |
| Top Gun Day | | |
| Independence Day | | |
| National Unification Day | | |
| Kamuzu Day | | |
| Ascension Day | | |
| Gospel Day | | |
| National Decency Day | | |
| National Dance Like a Chicken Day | | |
| National Buttermilk Biscuit Day | | |
| Mother's Day | | |
| King's Birthday (Day 1) observed | | |
| King's Birthday (Day 2) | | |
| Special Non-Working Day | | |
| Royal Ploughing Ceremony 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 | | |
| King's Birthday (Day 3) | | |
| Savitri Puja | | |
| Bring Flowers To Someone Day | | |
| National Straw Hat Day | | |
| National Police Week | | |
| International Vascular Birthmarks Awareness Day | | |
| SPLA Day | | |
| Ramadan Begins | | |
| 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 | | |
| Horse Rescue Day | | |
| National Barbecue Day | | |
| National Waiters Day | | |
| Drawing Day | | |
| National Numeracy Day | | |
| International Day Of Light | | |
| 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 | | |
| Orthodox Ascension Day | | |
| National Pack Rat Day | | |
| National Cherry Cobbler Day | | |
| National Graduation Tassel Day | | |
| National Walnut Day | | |
| Ramadan Begins | | |
| General Elections Holiday | | |
| National Notebook Day | | |
| National Work From Home Day | | |
| National Pinot Grigio Day | | |
| World Neurofibromatosis Awareness Day | | |
| Global Accessibility Awareness Day | | |
| Day of Revival, Unity, and the Poetry of Magtymguly | | |
| Flag Day/University Day | | |
| International Museum Day | | |
| Battle of Las Piedras | | |
| National Defense Transportation Day | | |
| Bike to Work Day | | |
| National HIV Vaccine Awareness Day | | |
| National Visit Your Relatives Day | | |
| National No Dirty Dishes Day | | |
| National Cheese Soufflé Day | | |
| General Elections Holiday | | |
| International Virtual Assistants Day | | |
| Commemoration of Atatürk, Youth and Sports Day | | |
| Armed Forces Day | | |
| Europe Day | | |
| Pentecost Eve | | |
| National Devil’s Food Cake Day | | |
| Erev Shavuot | | |
| World Whisky Day | | |
| National May Ray Day | | |
| World Fiddle Day | | |
| Plant A Lemon Tree Day | | |
| Restoration of Independence Day | | |
| National Day | | |
| Pentecost / Whit Sunday | | |
| Shavuot | | |
| 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 | | |
| World Baking 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 | | |
| Whit Monday | | |
| Discovery Day | | |
| Victoria Day | | |
| National Patriots' Day | | |
| National American Red Cross Founder’s Day | | |
| National Waitstaff Day | | |
| National Strawberries and Cream Day | | |
| National Memo Day | | |
| Day off for Commonwealth Day | | |
| International Tea Day | | |
| I Need A Patch For That Day | | |
| World Meditation Day | | |
| Rapture Party Day | | |
| International Day for Biological Diversity | | |
| Unity Day | | |
| Independence Day (2nd Day) | | |
| National Maritime Day | | |
| Buddha's Birthday | | |
| Harvey Milk Day | | |
| National Craft Distillery Day | | |
| National Solitaire Day | | |
| National Buy a Musical Instrument Day | | |
| National Vanilla Pudding Day | | |
| World Goth Day | | |
| Sherlock Holmes Day | | |
| International Day to End Obstetric Fistula | | |
| Labor Day / May Day | | |
| Constitution Day | | |
| Emergency Medical Services for Children Day | | |
| World Turtle Day | | |
| National Lucky Penny Day | | |
| National Taffy Day | | |
| Vlach’s National Day (for Vlach community) | | |
| Culture and Literacy Day | | |
| The Battle of Pichincha | | |
| Independence Day | | |
| Commonwealth Day | | |
| Bermuda Day | | |
| National Aviation Maintenance Technician Day | | |
| Brother’s Day | | |
| National Scavenger Hunt Day | | |
| National Escargot 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 Heroes Day | | |
| Africa Day | | |
| National Wine Day | | |
| National Tap Dance Day | | |
| National Brown-Bag It Day | | |
| Bermuda Day | | |
| Geek Pride Day | | |
| Independence Day | | |
| Independence Day | | |
| National Sorry Day | | |
| World Lindy Hop Day | | |
| Mother's Day | | |
| National Blueberry Cheesecake Day | | |
| National Paper Airplane Day | | |
| World Dracula Day | | |
| Sun Screen Day | | |
| Trinity Sunday | | |
| Orthodox Pentecost | | |
| Trinity | | |
| Mother's Day | | |
| Cultural Workers and Folk Artists Day | | |
| Kiev Day | | |
| Carpet Day | | |
| Mother Day | | |
| Children's Day | | |
| Dniester Day | | |
| National Cellophane Tape Day | | |
| National Grape Popsicle Day | | |
| Republic Day | | |
| Hamburger Day | | |
| Derg Downfall Day | | |
| Memorial Day | | |
| Spring Bank Holiday | | |
| Orthodox Pentecost Monday | | |
| Jefferson Davis Birthday | | |
| Holy Spirit Monday | | |
| Orthodox Pentecost holiday | | |
| National Brisket Day | | |
| Jefferson Davis' Birthday | | |
| Reconciliation Day | | |
| Republic Day | | |
| Late May Bank Holiday | | |
| 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 | | |
| Wesak - Buddha Day | | |
| Buddha's Parinirvana | | |
| Waisak Day (Buddha's Anniversary) | | |
| Wesak Day | | |
| Ganatantra Diwas (Republic Day) | | |
| Vesak Day | | |
| Esala Full Moon Poya Day | | |
| Visakha Bucha | | |
| National Biscuit Day | | |
| International Everest Day | | |
| Learn About Composting Day | | |
| Statehood Day | | |
| Anguilla Day | | |
| Day of the Canary Islands | | |
| Mother's Day | | |
| Indian Arrival Day | | |
| National Creativity Day | | |
| National Water a Flower Day | | |
| National Hole In My Bucket Day | | |
| National Mint Julep Day | | |
| Loomis Day | | |
| Harvest Festival | | |
| World No Tobacco Day | | |
| Royal Brunei Armed Forces Day | | |
| Day of Castile-La Mancha | | |
| Corpus Christi | | |
| Canaries day observed | | |
| Autonomous Vehicle Day | | |
| National Save Your Hearing Day | | |
| National Speak in Sentences Day | | |
| National Macaroon Day | | |
| National Smile Day | | |
| Necrotizing Fasciitis Awareness Day | | |
| Harvest Festival Day 2 | | |
| Web Designer Day | | |
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