While internationally, September is known for the start of the Hogwarts school year, there are a LOT of hashtag holidays to choose from. The Northern hemisphere is coming into Fall, so the fitness-based days give your audience an excuse to get out in the last of the sunshine.

Note: September 11 should be treated with respect. There’s always a brand or two using it as a sales opportunity. Here are some examples of how to remember September 11 tastefully.

This list starts with the hashtag holidays by day, followed by the celebration months. There’s a little duplication because that’s the nature of made up holidays. Some also rotate year-to-year and we’re still working at identifying those. If you know a holiday that’s missing or we’ve made a mistake, please let us know! Do you want the hashtag holidays emails to you monthly? Sign up at the bottom of the page.

September 1

Emma M Nutt Day | National Chicken Boy Day | National No Rhyme (Not Reason) Day | National College Colors Day | National Lazy Mom’s Day | The first day of Hogwarts | Building and Code Staff Appreciation Day | World Beard Day | Ginger Cat Appreciation Day | National Cherry Popover Day | National Gyro Day

September 2

National Beheading Day | National Blueberry Popsicle Day | V-J Day | Pet Rock Day | National Grits for Breakfast Day

September 3

Beard Day | Skyscraper Day | National Welsh Rarebit Day | US Bowling League Day | Mouthguard Day

September 4

National Newspaper Carrier Day | National Wildlife Day | National Macadamia Nut Day | College Colors Day

September 5

Be Late for Something Day | International Day of Charity | Global Talent Acquisition Day | National Cheese Pizza Day | National Another Look Unlimited Day

September 6

Fight Procrastination Day | National Coffee Ice Cream Day | National Read a Book Day

September 7

National Neither Rain Nor Snow Day | National Beer Lover’s Day | National Grandma Moses Day | National Acorn Squash Day | National Salami Day | Bring Your Manners to Work Day | Lazy Mom’s Day | Buy a Book Day | Superhuman Day | Labor Day (US in 2020)

September 8

National Date Nut Bread Day | Pardon Day | International Literacy Day | National Pediatric Hematology/Oncology Nurses Day | National Ampersand Day | Stand Up to Cancer Day | World Physical Therapy Day | Actors’ Day | Iguana Awareness Day | Star Trek Day | International Studebaker Day

September 9

National Grandparents Day | National Teddy Bear Day | Care Bears Share Your Care Day | National Wiener Schnitzel Day | Hug your Hound Day | Wonderful Weirdos Day | Worldwide Candle Lighting Day

September 10

National Swap Ideas Day | World Suicide Prevention Day | National TV Dinner Day | National Pet Memorial Day | National Hug Your Hound Day | National Grandparents Day | Boss/Employee Exchange Day | Banana Split Day | National S’mores Day

September 11

No News is Good News Day | Patriot Day and National Day of Service and Remembrance | National Make Your Bed Day | National Hot Cross Bun Day | National Boss/Employee Exchange Day

September 12

National Video Games Day | National Pet Memorial Day | National Chocolate Milkshake Day | National Day of Encouragement | National Ants on a Log Day | Quiet Day

September 13

Defy Superstition Day | Kids Take Over the Kitchen Day | National Peanut Day | National Programmers Day (256th day of the year) | Uncle Sam Day | Roald Dahl Day | Positive Thinking Day | Celiac Awareness Day | Snack a Pickle Day

September 14

National Cream-Filled Donut Day | National Eat a Hoagie Day | Hug Your Boss Day

September 15

National Felt Hat Day | International Day of Democracy | National POW/MIA Recognition Day | National Tradesmen Day | National Cheese Toast Day | National Linguine Day | National Double Cheeseburger Day | National LGBT Center Awareness Day | National Creme de Menthe Day | Day | Greenpeace Day | National Clean Up Day | Make a Hat Day | International Dot Day | Gymnastics Day

September 16

National Play-doh Day | Collect Rocks Day | International Day for the Preservation of the Ozone Layer | Trail of Tears Commemoration Day | Boys’ and Girls’ Day for Kids | Puppy Mill Awareness Day | Responsible Dog Ownership Day | National Cinnamon Raisin Bread Day | National Stepfamily Day | National Working Parents Day | Anne Bradstreet Day | Mayflower Day | National Gymnastics Day | Big Whopper Liar Day | Wife Appreciation Day | World Ozone Day | National Guacamole Day

September 17

National Apple Dumpling Day | Constitution Day | Citizenship Day | National Monte Cristo Day | Wife Appreciation Day | International Country Music Day | Locate an Old Friend Day

September 18

National Cheeseburger Day | National HIV/AIDS and Aging Awareness Day | World Water Monitoring Day | Air Force’s Birthday | Get Ready Day | Respect Day | Hug a Greeting Card Writer Day | National Read an Ebook Day | First Love Day

September 19

Talk Like a Pirate Day | National Butterscotch Pudding Day | National IT Professionals Day | International Red Panda Day | National School Backpack Awareness Day

September 20

National Punch Day

September 21

International Day of Peace | World Gratitude Day | International Banana Festival | National Pecan Cookie Day | Mini Golf Day | Concussion Awareness Day | Tradesmen Day | World Alzheimer’s Day

September 22

Hobbit Day | Dear Diary Day | National Centenarian’s Day | National White Chocolate Day | AKC Responsible Dog Ownership Day | American Business Women’s Day | World Car Free Day | Elephant Appreciation Day | National Ice Cream Cone Day | Doodle Day | International Rabbit Day | Falls Prevention Awareness Day | September Equinox (2020) | National Voter Registration Day (2020) 

September 23

Checkers Day | Dogs in Politics Day | Celebrate Bisexuality Day | National Great American Pot Pie Day | Restless Legs Awareness Day | National Hunting and Fishing Day | Supernatural Day | National Key Lime Pie Day

September 24

Festival of Latest Novelties | National Cherries Jubilee Day | National Punctuation Day | Schwenkfelder Thanksgiving | National Gold Star Mother’s Day | Family Day | Family Health and Fitness Day USA

September 25

National Comic Book Day | National One-Hit Wonder Day | National Tune-Up Day | National Research Administrator Day | World Dream Day | World Pharmacists Day | Math Storytelling Day | Psychotherapy Day | Cooking Day | Binge Day | National Lobster Day

September 26

National Good Neighbor Day | National Pancake Day | National Gay Men’s HIV/AIDS Awareness Day | European Day of Languages | National Situational Awareness Day | National Dumpling Day | National Johnny Appleseed Day | National Shamu the Whale Day | National Woman Road Warrior Day | Batman Day | Lumberjack Day | Love Note Day | Fitness Day

September 27

National Crush a Can Day | World Tourism Day | National Women’s Health and Fitness Day | National Chocolate Milk Day | National Corned Beef Hash Day | Ancestor Appreciation Day | Morning Show Hosts Day

September 28

Ask a Stupid Question Day | World Rabies Day | International Right to Know Day | National Drink Beer Day | National Good Neighbor Day | National Strawberry Cream Pie Day | Hug a Vegetarian Day | Sport Purple for Platelets Day

September 29

Poisoned Blackberries Day | National Coffee Day | VFW Day | World Heart Day | Save your Photos Day

September 30

International Podcast Day | National Mud Pack Day | National Family Health and Fitness Day USA | National Public Lands Day | Blasphemy Day | National Chewing Gum Day | National Hot Mulled Cider Day | International Translation Day | Pony Express Day

September’s Celebration Hashtag Months

National Suicide Prevention Month | Baby Safety Month | Polycystic Ovarian Syndrome Awareness Month | Self Improvement Month | National Learning and Development Month | Whole Grains Month | Better Breakfast Month | National Rice Month | National Potato Month | National Blueberry Popsicle Month | National Chicken Month | National Mushroom Month | National Papaya Month | Classical Music Month | Fall Hat Month | Little League Month | International Square Dancing Month | National Courtesy Month | National Mortgage Professional Month | National Piano Month

National Preparedness Month | National Sewing Month | Hispanic Heritage Month (September 15-October 15) | Intergeneration Month | Childhood Cancer Awareness Month | Fruits & Veggies—More Matters® Month | Healthy Aging® Month | National Atrial Fibrillation Awareness Month | National Childhood Obesity Awareness Month | National Food Safety Education Month | National ITP Awareness Month | National Pediculosis Prevention Month/Head Lice Prevention Month | National Sickle Cell Month

National Traumatic Brain Injury Awareness Month | National Yoga Awareness Month | Newborn Screening Awareness Month | Ovarian Cancer Awareness Month | Pain Awareness Month | Prostate Cancer Awareness Month | Sepsis Awareness Month | Sexual Health Awareness Month | World Alzheimer’s Month | National Biscuit Month | National Bourbon Heritage Month | California Wine Month | National Honey Month | National Organic Harvest Month

Other Hashtag Holidays

January Hashtag Holidays (coming soon)
February Hashtag Holidays (coming soon)
March Hashtag Holidays (coming soon)
May Hashtag Holidays (coming soon)
June Hashtag Holidays (coming soon)
July Hashtag Holidays (coming soon)
August Hashtag Holidays (coming soon)
September Hashtag Holidays
October Hashtag Holidays
November Hashtag Holidays
December Hashtag Holidays

Sign Up

Subscribe for free and have the latest list of hashtag holidays emailed to you monthly.