September 1st:
National Forgiveness Day, National Hotel Employee Day, National Pastor’s Spouse Day (first Sunday in September), National Burnt Ends Day, National Acne Positivity Day, National No Rhyme (nor reason) Day, National Chicken Boy Day, and National V-J Day.
September 2nd:
National Blueberry Popsicle Day and Labor Day (the first Monday in September).
September 3rd:
U.S. Bowling League Day, National Welsh Rarebit Day, and National Another Look Unlimited Day (the day after Labor Day).
September 4th:
National Spice Blend Day, National Macadamia Nut Day, National Newspaper Carrier Day, and National Wildlife Day.
September 5th:
National Be Late for Something Day, National Cheese Pizza Day, National Chianti Day (first Friday in September), National Food Bank Day (first Friday in September), and National Lazy Mom’s Day (first Friday in September).
September 6th:
National Read a Book Day, National Coffee Ice Cream Day, National Play Outside Day (first Saturday in September), and National Hummingbird Day (first Saturday in September).
September 7th:
National New Hampshire Day, National Grateful Patient Day, National Tailgating Day (first Saturday in September), National Beer Lover’s Day, National Salami Day, National Acorn Smash Day, National Grandma Moses Day, and National Neither Snow nor Rain Day.
September 8th:
Star Trek Day, World Ampersand Day, National Pet Memorial Day (second Sunday in September), National Pediatric Hematology/Oncology Nurses Day, National Hug Your Hound Day (second Sunday in September), National Grandparents Day (Sunday after Labor Day), and National Wiener Schnitzel Day.
September 9th:
Share Your Care Day, National Boss/Employee Exchange Day (Monday after Labor Day), and National Teddy Bear Day.
September 10th:
National Ants on a Log Day, National TV Dinner Day, and National Swap Ideas Day.
September 11th:
National Hot Cross Bun Day, National Make Your Bed Day, Patriot Day, and National Day of Service and Remembrance.
September 12th:
National Day of Encouragement, National Hug & High 5 Day, National Just One Human Family Day, National School Picture Day (second Thursday in September), National Report Medicare Fraud Day, Day of the Programmer (256th day of the year), National Video Games Day, and National Chocolate Milkshake Day.
September 13th:
Positive Thinking Day, National Celiac Disease Awareness Day, Uncle Sam Day, National Blame Someone Else Day (first Friday the thirteenth of the year), National Peanut Day, National Kids Take Over the Kitchen Day, and National Bald is Beautiful Day.
September 14th:
National Parents Off Day, National Sober Day, National Virginia Day, National Live Creative Day, National Eat a Hoagie Day, and National Cream-Filled Donut Day.
September 15th:
National Online Learning Day, National Neonatal Nurses Day, National Tackle Kids Cancer Day, National Cheese Toast Day, National Double Cheeseburger Day, National Linguine Day, National Creme De Menthe Day, Wife Appreciation Day (third Sunday in September), and National Felt Hat Day.
September 16th:
National Guacamole Day, National Working Parents Day, National Step Family Day, National Play-Doh Day, National Cinnamon Raisin Bread Day, and Mayflower Day.
September 17th:
National Professional House Cleaners Day, National Monte Cristo Day, National It Professionals Day (third Tuesday in September), National Voter Registration Day (changes annually), National Apple Dumpling Day, Constitution Day and Citizenship Day.
September 18th:
Air Force Birthday, National HIV/AIDS and Aging Awareness Day, and National Cheeseburger Day.
September 19th:
National Pawpaw Day (third Thursday in September), National Butterscotch Pudding Day, and Talk Like a Pirate Day.
September 20th:
National Care for Kids Day, National Fried Rice Day, Pepperoni Pizza Day, National String Cheese Day, National Punch Day, National Tradesman Day (third Friday in September), National POW/MIA Recognition Day (third Friday in September).
September 21st:
National Seat Check Saturday (changes annually), National Chai Day, National Singles Day (Saturday of Singles Week), National New York Day, National Cleanup Day, National Gymnastics Day (third Saturday in September), National Pecan Cookie Day, Responsible Dog Ownership Day (third Saturday in September), Puppy Mill Awareness Day (third Saturday in September), Boys’ and Girls’ Club Day for Kids (third Saturday in September), and National Dance Day (third Saturday in September).
September 22nd:
National Brown Butter Day, National States and Capitals Day, National Online Recovery Day, National Girls’ Night, National White Chocolate Day, National Centenarian’s Day, National Ice Cream Cone Day, Hobbit Day, National Elephant Appreciation Day, Dear Diary Day, Car Free Day, Autumnal Equinox (changes annually), American Business Woman’s Day, and National Family Day (fourth Monday in September).
September 23rd:
National Teal Talk Day, National Snack Stick Day, National Great American Pot Pie Day, National Checkers Day and Dogs in Politics Day, Restless Legs Awareness Day, Celebrate Bisexual Day, and Innergize Day (Day after the Autumnal Equinox).
September 24th:
National Cherries Jubilee Day and National Punctuation Day.
September 25th:
World Dense Breast Day (last Wednesday in September), National Open the Magic Day, National Daughter’s Day, National Quesadilla Day, National Lobster Day, National Research Administrator Day, National Tune-Up Day, National Comic Book Day, Math Storytelling Day, National One-Hit Wonder Day, National Women’s Health and Fitness Day (last Wednesday in September).
September 26th:
National Compliance Officer Day, National Situational Awareness Day, National Dumpling Day, National Pancake Day, National Johnny Appleseed Day, and National Shamu the Whale Day.
September 27th:
National Gay Men’s HIV/AIDS Awareness Day (last Friday in September), National Day of Forgiveness, National Scarf Day, National Brave Day (fourth Friday in September), National Corn Beefed Hash Day, National Crush a Can Day, and National Chocolate Milk Day.
September 28th:
National North Carolina Day, Save Your Photos Day (last Saturday in September), National Ghost Hunting Day (last Saturday in September), National Drink Beer Day, National Strawberry Cream Pie Day, National Good Neighbor Day, National Public Lands Day (fourth Saturday in September), National Hunting and Fishing Day (fourth Saturday in September), and National Family Health & Fitness Day USA (last Saturday in September).
September 29th:
Urban National Wildlife Refuse Day, National VFW Day, National Coffee Day, Gold Star Mother’s and Family Day (last Sunday in September).
September 30th:
Orange Shirt Day, National Love People Day, National Hot Mulled Cider Day, National Mud Pack Day, and National Chewing Gum Day.
Source: National Day Calendar
