| March Equinox | |  |
| International Day of Happiness | |  |
| Nowruz | |  |
| World Storytelling Day | |  |
| Independence Day | |  |
| International Francophonie Day | |  |
| National Ravioli Day | |  |
| National Native HIV/AIDS Awareness Day | |  |
| National Proposal Day | |  |
| National Farm Rescuer Day | |  |
| National Close the Gap Day | |  |
| Spring Equinox | |  |
| Absolutely Incredible Kid Day | |  |
| National Kiss Your Fiance Day | |  |
| National Macaron Day | |  |
| French Language Day | |  |
| National Snowman Burning Day | |  |
| Won’t You Be My Neighbor Day | |  |
| Companies That Care Day | |  |
| Hufflepuff Pride Day | |  |
| International Day for the Elimination of Racial Discrimination | |  |
| World Poetry Day | |  |
| World Down Syndrome Day | |  |
| International Day of Forests | |  |
| Nowruz | |  |
| Harmony Day | |  |
| Independence Day | |  |
| Human Rights Day | |  |
| National Common Courtesy Day | |  |
| National Countdown Day | |  |
| National Single Parent Day | |  |
| National Fragrance Day | |  |
| National California Strawberry Day | |  |
| National French Bread Day | |  |
| International Nowruz Day | |  |
| Martyrdom of Imam Ali | |  |
| Mother's Day | |  |
| World Vermouth Day | |  |
| National Healthy Fats Day | |  |
| National Crunchy Taco Day | |  |
| World Puppetry Day | |  |
| Slytherin Pride Day | |  |
| World Water Day | |  |
| National Goof Off Day | |  |
| National Bavarian Crepes Day | |  |
| Emancipation Day | |  |
| Nowruz Holiday | |  |
| As Young As You Feel Day | |  |
| Nowruz | |  |
| Gryffindor Pride Day | |  |
| Day Of The Sea | |  |
| World Meteorological Day | |  |
| Pakistan Day | |  |
| Puppy Day | |  |
| National Chia Day | |  |
| National Chip and Dip Day | |  |
| National Near Miss Day | |  |
| National Melba Toast Day | |  |
| Nowruz Holiday | |  |
| Birthday of the Sultan of Johor | |  |
| Southern Africa Liberation Day | |  |
| World Atheist Day | |  |
| Memorial Day | |  |
| World Tuberculosis Day | |  |
| International Day for the Right to the Truth concerning Gross Human Rights Violations and for the Dignity of Victims | |  |
| National Chocolate Covered Raisin Day | |  |
| St. Joseph's Day | |  |
| Otago Anniversary Day | |  |
| Commonwealth Covenant Day | |  |
| Nowruz Holiday | |  |
| National Cocktail Day | |  |
| National Cheesesteak Day | |  |
| Flatmate’s Day | |  |
| Greek Independence Day | |  |
| International Day of Remembrance of Slavery Victims and the Transatlantic Slave Trade | |  |
| International Day of Solidarity with Detained and Missing Staff Members | |  |
| Feast of the Annunciation | |  |
| Struggle for Human Rights Day | |  |
| Independence Day | |  |
| Annunciation of the Lord | |  |
| International Waffle Day | |  |
| Anniversary of the Arengo | |  |
| National Lobster Newburg Day | |  |
| National Medal of Honor Day | |  |
| National Tolkien Reading Day | |  |
| National American Diabetes Association Alert Day | |  |
| Maryland Day | |  |
| Mother’s Day | |  |
| National Day of Life, Peace and Justice | |  |
| Make Up Your Own Holiday Day | |  |
| Prince Jonah Kuhio Kalanianaole Day | |  |
| Martyrs' Day | |  |
| Purple Day | |  |
| National Spinach Day | |  |
| National Nougat Day | |  |
| National Little Red Wagon Day | |  |
| Manatee Appreciation Day | |  |
| Laylat al-Qadr (Night of Power) | |  |
| Laylat al-Qadr | |  |
| Wear A Hat Day | |  |
| American Red Cross Giving Day | |  |
| Armed Forces' Day | |  |
| National Scribble Day | |  |
| National Joe Day | |  |
| National Spanish Paella Day | |  |
| International Whisk(e)y Day | |  |
| World Theatre Day | |  |
| Quirky Country Music Song Titles Day | |  |
| Children's Picture Book Day | |  |
| Eat an Eskimo Pie Day | |  |
| National Black Forest Cake Day | |  |
| National Something On a Stick Day | |  |
| Weed Appreciation Day | |  |
| National Triglycerides Day | |  |
| Respect Your Cat Day | |  |
| Youth Day | |  |
| Martyrs' Day | |  |
| Smoke and Mirrors Day | |  |
| Commemoration of Boganda | |  |
| National Vietnam War Veterans Day | |  |
| National Mom and Pop Business Owners Day | |  |
| National Lemon Chiffon Cake Day | |  |
| Earth Hour | |  |
| World Piano Day | |  |
| Nano Days | |  |
| International Mermaid Day | |  |
| Niagara Falls Runs Dry Day | |  |
| Spiritual Baptist Liberation Day | |  |
| National Doctors' Day | |  |
| National Take a Walk in the Park Day | |  |
| National I Am in Control Day | |  |
| National Pencil Day | |  |
| National Turkey Neck Soup Day | |  |
| National Virtual Vacation Day | |  |
| Ugadi | |  |
| Eid al-Fitr (End of Ramadan) | |  |
| Mother's Day | |  |
| Mothering Sunday | |  |
| National Neighbor Day | |  |
| Pretzel Sunday | |  |
| Transfer Day | |  |
| Freedom Day | |  |
| Micronesia Culture Day (Chuuk & Pohnpei) | |  |
| National Crayon Day | |  |
| National Tater Day | |  |
| National Bunsen Burner Day | |  |
| National Clams on the Half Shell Day | |  |
| National Prom Day | |  |
| Eid al-Fitr (End of Ramadan) | |  |
| Seward's Day | |  |
| César Chávez Day | |  |
| Hari Raya Puasa | |  |
| World Backup Day | |  |
| National Farm Workers Day | |  |
| Eiffel Tower Day | |  |
| National Cream Cheese Frosting Day | |  |
| National Day | |  |
| Investiture of the Captains Regent | |  |
| April Fool's Day | |  |
| National Poetry Month | |  |
| National One Cent Day | |  |
| National Sourdough Bread Day | |  |
| SAAM Day of Action | |  |
| Eid al-Fitr (End of Ramadan) Holiday | |  |
| National Atheist Day | |  |
| Sexual Assault Awareness Month | |  |
| World Sarcoidosis Awareness Month | |  |
| Fun Day | |  |
| International Fun At Work Day | |  |
| Reading Is Funny Day | |  |
| National Garden Month | |  |
| Summer Tire Changeover Month | |  |
| National Soft Pretzel Month | |  |
| National Afternoon Tea Month | |  |
| National Autism Awareness Month | |  |
| National Month Of Hope | |  |
| National Humor Month | |  |
| National Safe Digging Month | |  |
| Adopt A Ferret Month | |  |
| National Pecan Month | |  |
| National Fresh Celery Month | |  |
| National Brunch Month | |  |
| International Guitar Month | |  |
| Active Dog Month | |  |
| National Decorating Month | |  |
| Month Of The Military Child | |  |
| National Straw Hat Month | |  |
| National Welding Month | |  |
| National Canine Fitness Month | |  |
| Limb Loss And Limb Difference Awareness Month | |  |
| National Cannabis Awareness Month | |  |
| National Soy Foods Month | |  |
| Stress Awareness Month | |  |
| National Jazz Appreciation Month | |  |
| National Child Abuse Awareness Month | |  |
| Day of the Veterans | |  |
| Union Day of Belarus and Russia | |  |
| International Children's Book Day | |  |
| National Reconciliation Day | |  |
| National Peanut Butter and Jelly Day | |  |
| National Ferret Day | |  |
| National Walking Day | |  |
| Childhelp National Day of Hope | |  |
| Pascua Florida Day | |  |
| World Autism Awareness Day | |  |
| Eid al-Fitr (End of Ramadan) Holiday | |  |
| National Film Score Day | |  |
| National Tweed Day | |  |
| National Chocolate Mousse Day | |  |
| National Find a Rainbow Day | |  |
| National Burrito Day | |  |
| Eid al-Fitr (End of Ramadan) Holiday | |  |
| Näfelser Fahrt | |  |
| World Party Day | |  |
| World Aquatic Animal Day | |  |
| Fish Fingers And Custard Day | |  |
| 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 | |  |