March 1st
- National Minnesota Day
- National Dadgum That’s Good Day
- National Fruit Compote Day
- National Horse Protection Day
- National Peanut Butter Lover’s Day
- National Pig Day
March 2nd
- National Banana Cream Pie Day
- National Old Stuff Day
- National Read Across America Day (Dr. Seuss Day) – If on Weekend, Moves to Closest School Day
- National Speech and Debate Education Day – By Annual Resolution
- National Employee Appreciation Day – First Friday in March
- National Dress in Blue Day – First Friday in March
March 3rd
- National Soup it Forward Day*
- National Anthem Day
- National Cold Cuts Day
- National I Want You to be Happy Day
- National Mulled Wine Day
March 4th
- Finisher’s Medal Day* – First Sunday in March
- Marching Music Day
- National Grammar Day
- National Hug a G.I. Day
- National Pound Cake Day
March 5th
- National Absinthe Day
- National Cheese Doodle Day
- National Multiple Personality Day
March 6th
- National Dress Day
- National Dentist’s Day
- National Frozen Food Day
- National Oreo Cookie Day
- National White Chocolate Cheesecake Day
March 7th
- National Be Heard Day
- National Cereal Day
- National Crown of Roast Pork Day
March 8th
- National Oregon Day
- International
Women’s Day - National Peanut Cluster Day
- National Proofreading Day
March 9th
- National Day of Unplugging – Second Friday in March
- National Barbie Day
- National Crabmeat Day
- National Get Over it Day
- National Meatball Day
March 10th
- National Blueberry Popover Day
- National Mario Day
- National Pack Your Lunch Day
- National Women and Girls HIV/AIDS Awareness Day
March 11th
- National Johnny Appleseed Day
- National Oatmeal Nut Waffles Day
- National Proposal Day
- National Worship of Tools Day
- Daylight Saving Time – Second Sunday in March
March 12th
- National Girl Scout Day
- National Plant a Flower Day
- National Napping Day – Day after Return of Daylight Saving Day
March 13th
- National Coconut Torte Day
- National Earmuff Day
- National Good Samaritan Day
- National Jewel Day
- National K9 Veterans Day
- National Open an Umbrella Indoors Day
March 14th
- National Write Your Story Day *
- National Children’s Craft Day
- National Learn About Butterflies Day
- National Pi Day
- National Potato Chip Day
- National Registered Dietitian Nutritionist Day – Second Wednesday in March
March 15th
- National Kansas Day
- National Everything You Think Is Wrong Day
- National Pears Helene Day
- National Shoe the World Day
March 16th
- National Farm Rescuer Day
- National Artichoke Hearts Day
- National Everything You Do Is Right Day
- National Freedom of Information Day
- National Panda Day
March 17th
- National Corned Beef and Cabbage Day
- St. Patrick’s Day
- National Quilting Day – Third Saturday in March
- National Corn Dog Day – Changes Annually
March 18th
- National Awkward Moments Day
- National Biodiesel Day
- National Lacy Oatmeal Cookie Day
- National Sloppy Joe Day
- National Supreme Sacrifice Day
March 19th
- National Certified Nurses Day
- National Chocolate Caramel Day
- National Let’s Laugh Day
- National Poultry Day
March 20th
- National Native HIV/AIDS Awareness Day
- National Proposal Day
- National Ravioli Day
- Spring Begins – Changes Annually March 20, 2018
- National Ag Day – Changes Annually
March 21st
- National California Strawberry Day
- National Common Courtesy Day
- National Fragrance Day
- National French Bread Day
- National Single Parent Day
- National Kick Butts Day – Changes Annually
March 22nd
- National West Virginia Day
- National Bavarian Crepes Day
- National Goof Off Day
March 23rd
- National Chia Day
- National Chip and Dip Day
- National Near Miss Day
- National Melba Toast Day
- National Puppy Day – Typically celebrated on March 23rd, however observed on a Friday or Monday when falling on a weekend
March 24th
- National Chocolate Covered Raisin Day
March 25th
- National Lobster Newburg Day
- National Medal of Honor Day
- National Tolkien Reading Day
March 26th
- Epilepsy Awareness Day – Purple Day
- National Nougat Day
- National Spinach Day
March 27th
- National Joe Day
- National Spanish Paella Day
- National American Diabetes Association Alert Day – Fourth Tuesday in March
- National Education and Sharing Day – Changes Annually – 11th day of the month of Nisan on the Jewish calendar
March 28th
- National Black Forest Cake Day
- National Something on a Stick Day
- National Weed Appreciation Day
- National Little Red Wagon Day – Last Wednesday in March
- Manatee Appreciation Day – Last Wednesday in March
March 29th
- National Nevada Day
- National Vietnam War Veterans Day
- National Lemon Chiffon Cake Day
- National Mom and Pop Business Owners Day
March 30th
- Virtual Vacation Day*
- National Doctors Day
- National I Am in Control Day
- National Pencil Day
- National Take a Walk in the Park Day
- National Turkey Neck Soup Day
March 31st
- National Bunsen Burner Day
- National Clams on the Half Shell Day
- National Crayon Day
- National Prom Day
- National Tater Day
