| 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 | | |
| Seward's Day | | |
| 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 | | |
| National Education and Sharing Day | | |
| César Chávez Day | | |
| 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 | | |
| National Walking Day | | |
| Childhelp National Day of Hope | | |
| Passover Eve | | |
| 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 Burrito Day | | |
| Maundy Thursday | | |
| Passover (First Day) | | |
| Pascua Florida Day | | |
| World Autism Awareness Day | | |
| Näfelser Fahrt | | |
| National Film Score Day | | |
| National Tweed Day | | |
| National Chocolate Mousse Day | | |
| National Find a Rainbow Day | | |
| Good Friday | | |
| Passover (2nd Day) | | |
| Children's Day observed | | |
| World Party Day | | |
| Walk to Work 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 | | |
| National Love Our Children Day | | |
| Holy Saturday | | |
| Tomb Sweeping Day (Qing Ming Jie) | | |
| Passover (3rd Day) | | |
| Children's Day | | |
| Tell a Lie Day | | |
| National Handmade Day | | |
| International Carrot Day | | |
| World Rat Day | | |
| National DIY Day | | |
| International Pillow Fight Day | | |
| D.A.R.E. Day | | |
| International Firewalk Day | | |
| Tangible Karma 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 | | |
| Easter | | |
| Tomb Sweeping Day (Qing Ming Jie) | | |
| Passover (4th Day) | | |
| Arbor Day | | |
| A Drop of Water - A grain of Gold | | |
| Geologists’ Day | | |
| International Day Of Conscience | | |
| Hospital Admitting Clerks 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 | | |
| Easter Monday | | |
| Passover (5th Day) | | |
| Kuan Yin's Birthday | | |
| Family Day | | |
| Dyngus day | | |
| National Siamese Cat Day | | |
| Army Day in United States | | |
| National Acai Bowl Day | | |
| Plan Your Epitaph Day | | |
