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September 2021 Holidays + Fun, Weird and Special Dates

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Are you a small business owner or marketer? Looking for September holidays or special dates to celebrate on social media?

Marketing your business on social media just got a lot easier with this complete list of holidays, observances, and special dates for September 2021.

The list includes more than 370 different holidays and observances to celebrate in September.

To learn why holidays make great social media posts read: The Complete Calendar of Social Media Holidays.

Holiday Hashtags for Social Media

When celebrating holidays on social media, it’s important to include the relevant hashtag(s) for that holiday in your post.

Using hashtags will help increase the reach of your post, exposing your business to a larger audience.

Hashtags are such an essential piece to your success on social media that I’ve done the research for you.

Most of the holidays listed below include the corresponding hashtag for social media.

For more social media post ideas read: What to Post on Social Media – 100 Post Ideas for 2020.

List of September 2021 Holidays

In an effort to simplify this massive list of holidays, I’ve divided the days into five categories – public holidays, religious holidays, monthly observances, weekly observances, and daily observances.

Scroll down to view all 370+ holidays or use the following links to skip ahead to a specific category.

Access all Holidays for the Year

Bonus 2021 Holidays

Did you know there are over 3,300 holidays to celebrate on social media each year? 

Click here for a complete listing of holidays for every month of the year.  

If you’d like a printable PDF with all the holidays listed out by month, check out the Social Media Content App.  It includes a free PDF of all 3,300+ holidays.

September 2021 Public Holidays

This list contains public holidays and special observances in the United States, Australia, Canada, and the United Kingdom.
DateHolidayHashtagWhere Observed
September 5Father's Day#FathersDayAustralia
September 6Labor Day #LaborDayUnited States
September 6Labour Day#LabourDayCanada
September 11Patriot Day#PatriotDayUnited States
September 16Independence Day#MexicanIndependenceDayMexico
September 221st Day of Fall #FirstDayOfFallNorth America
September 22September Equinox#AutumnEquinox United Kingdom
September 23September Equinox#SpringEquinoxAustralia
September 24Friday Before the AFL Grand Final#AFLParadeFridayVictoria, Australia
September 27Queen's Birthday#QueensBirthdayWestern Australia

September 2021 Religious Holidays

September 6Rosh Hashana Eve#RoshHashanaJewish
September 7Rosh Hashana#RoshHashanaJewish
September 9Gedaliah Fast #GedaliahJewish
September 15 Yom Kippur Eve #YomKippurJewish
September 16 Yom Kippur#YomKippurJewish
September 20Sukkot Eve#SukkotJewish
September 21 First Day of Sukkot#SukkotJewish
September 27Hoshana Rabbah# HoshanaRabbahJewish
September 28Shemini Atzeret / Simchat Torah#Atzeret #SimchatTorahJewish
September 29Michaelmas#MichaelmasChristian

September 2021 Monthly Observances

All American Breakfast Month
Animal Pain Awareness Month
Atrial Fibrillation Month
Attendance Awareness Month
Baby Safety Month
Backpack Safety America Month
Be Kind To Editors & Writers Month
Better Breakfast Month
Blood Cancer Awareness Month
Bourbon Heritage Month
Childhood Cancer Awareness Month
Cholesterol Education Month
Classical Music Month
Craniofacial Acceptance Month
Gynecologic Cancer Awareness Month
Happy Cat Month
Healthy Aging Month
Histiocytosis Awareness Month
Hunger Action Month
Intergeneration Month
International Childhood Cancer Awareness Month
International People Skills Month
International Speak Out Month
International Square Dancing Month
International Strategic Thinking Month
International Update Your Resume Month
International Women's Friendship Month
ITP Awareness Month
Library Card Sign-up Month
National Americana Month
National Campus Safety Awareness Month
National Chiari Awareness Month
National Chicken Month
National Child Awareness Month
National Childhood Cancer Awareness Month
National Childhood Obesity Awareness Month
National Cholesterol Education Month
National College Savings Month
National Coupon Month
National Courtesy Month
National DNA, Genomics & Stem Cell Education Month
National Family Meals Month
National Food Safety Education Month
National Head Lice Prevention Month
National Hispanic Heritage Month (9/15-10/15)
National Home Furnishings Month
National Honey Month
National Infant Mortality Awareness Month
National Italian Cheese Month
National Mold Awareness Month
National Mortgage Professional Month
National Mushroom Month
National Ovarian Cancer Awareness Month
National Passport Awareness Month
National Peripheral Artery Disease (PAD) Awareness Month
National Piano Month
National Potato Month
National Preparedness Month
National Prostate Health Month
National Recovery Month
National Rice Month
National Save A Tiger Month
National Service Dog Month
National Sewing Month
National Sickle Cell Awareness Month
National Skin Care Awareness Month
National Spinal Cord Injury Awareness Month
National Wilderness Month
Organic Harvest Month
Pain Awareness Month
Polycystic Ovarian Syndrome (PCOS) Awareness Month
Pulmonary Fibrosis (PF) Awareness Month
Save The Koala Month
Save Your Photos Month
Self Improvement Month
Self-Care Awareness Month
Sexual Health Month
Shameless Promotion Month
Subliminal Communications Month
Thyroid Cancer Awareness Month
Whole Grains Month
World Alzheimer's Month
World Animal Remembrance Month
World Beach Month

Social Media Just Got Easy

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Jecara tried it and said: “WOW!! The app didn’t just save me time, but saved me mental strain and the sense of social media overwhelm was ZERO!! I LOVE THIS APP!!”

Daily Post Prompts Social Media Content App

Click here to start your free 7-day trial and see why business owners around the world are raving about the Social Content App.

September 2021 Weekly Observances

Sept. 1 - 7National Childhood Injury Prevention Week
Sept. 5 - 11National Suicide Prevention Week
Sept. 5 - 11National Waffle Week
Sept. 6 - 10International Air Ambulance Week
Sept. 6 - 10National Payroll Week
Sept. 12 - 18Balance Awareness Week
Sept. 12 - 18Healthcare Environmental Services Week
Sept. 12 - 18International Housekeepers Week
Sept. 12 - 18National Assisted Living Week
Sept. 12 - 18National Nephrology Nurses Week
Sept. 12 - 18National Security Officer Appreciation Week
Sept. 12 - 18National Truck Driver Appreciation Week
Sept. 17 - 23Constitution Week
Sept. 17 - 26National Ballroom Dance Week
Sept. 19 - 24Pollution Prevention Week
Sept. 19 - 24World Mitochondrial Disease Week
Sept. 19 - 25Child Passenger Safety Awareness Week
Sept. 19 - 25Deaf Dog Awareness Week
Sept. 19 - 25International Clean Hands Week
Sept. 19 - 25International Week of the Deaf
Sept. 19 - 25National Employ Older Workers Week
Sept. 19 - 25National Farm Safety & Health Week
Sept. 19 - 25National Rehabilitation Awareness Week
Sept. 19 - 25National Singles Week
Sept. 19 - 25National Surgical Technologists Week
Sept. 20 - 26World Reflexology Week
Sept. 26 - Oct 2Banned Books Week

September 2021 Daily Observances

September 1Building and Code Staff Appreciation Day#BuildingAndCodeStaffAppreciationDay
September 1Chicken Boy’s Day#ChickenBoysDay
September 1Emma M. Nutt Day#EmmaMNuttDay
September 1National No Rhyme or Reason Day#NoRhymeOrReasonDay
September 1World Letter Writing Day#LetterWritingDay
September 2Bison-ten Yell Day#BisonTenYellDay
September 2Calendar Adjustment Day#CalendarAdjustmentDay
September 2National Blueberry Popsicle Day#BlueberryPopsicleDay
September 2World Coconut Day#CoconutDay
September 3Bring Your Manners To Work Day#BringYourMannersToWorkDay
September 3National College Colors Day#CollegeColorsDay
September 3National Food Bank Day#FoodBankDay
September 3National Lazy Mom's Day#LazyMomsDay
September 3National Skyscraper Day#NationalSkyscraperDay
September 3National Welsh Rarebit Day #NationalWelshRarebitDay
September 3U.S. Bowling League Day#USBowlingLeagueDay
September 4Eat an Extra Dessert Day#EatAnExtraDessertDay
September 4National Macadamia Nut Day#MacadamiaNutDay
September 4National Newspaper Carrier Day#NewspaperCarrierDay
September 4National Tailgating Day#TailgatingDay
September 4National Wildlife Day#NationalWildlifeDay
September 4World Beard Day#BeardDay
September 4Franchise Appreciation Day#FranchiseAppreciationDay
September 4International Bacon Day#BaconDay
September 5International Day of Charity#DayOfCharity
September 5National Be Late For Something Day#BeLateForSomethingDay
September 5National Cheese Pizza Day#NationalCheesePizzaDay
September 5Pet Rock Day#PetRockDay
September 6National Coffee Ice Cream Day#CoffeeIceCreamDay
September 6National Read A Book Day#ReadABookDay
September 7Another Look Unlimited Day#AnotherLookUnlimitedDay
September 7Google Commemoration Day#GoogleCommemorationDay
September 7National Acorn Squash Day#AcornSquashDay
September 7National Beer Lover’s Day#NationalBeerLoversDay
September 7National Grandma Moses Day#GrandmaMosesDay
September 7National Grateful Patient Day#gratefulpatient
September 7National Neither Snow Nor Rain Day #NeitherSnowNorRainDay
September 7National Salami Day#NationalSalamiDay
September 7Telephone Tuesday#TelephoneTuesday
September 8International Literacy Day#LiteracyDay
September 8National Ampersand Day #AmpersandDay
September 8National Pediatric Hematology/Oncology Nurses Day#PediatricHematologyOncologyNursesDay
September 8Pardon Day#PardonDay
September 8World Physical Therapy Day#PhysicalTherapyDay
September 9Care Bears Share Your Care Day#ShareYourCare
September 9National Teddy Bear Day #NationalTeddyBearDay
September 9National Wiener Schnitzel Day#wienerschnitzelday
September 10National 401(k) Day#401kDay
September 10National Swap Ideas Day#NationalSwapIdeasDay
September 10National TV Dinner Day#NationalTVDinnerDay
September 10Stand Up To Cancer Day#StandUpToCancerDay
September 10World Suicide Prevention Day#SuicidePreventionDay
September 11Farmers' Consumer Awareness Day#FarmersConsumerAwarenessDay
September 11German Language Day#GermanLanguageDay
September 11Libraries Remember Day#LibrariesRememberDay
September 11National Hot Cross Bun Day#NationalHotCrossBunsDay
September 11National Iguana Awareness Day#IguanaAwarenessDay
September 11National Make Your Bed Day#NationalMakeYourBedDay
September 11Patriot Day (US)#PatriotDay
September 12Day of the Homeland (Germany) #DayOfTheHomelandGermany
September 12International Day for South-South Cooperation#DayForSouthSouthCooperation
September 12National Chocolate Milkshake Day#ChocolateMilkshakeDay
September 12National Day of Encouragement#NationalDayofEncouragement
September 12National Grandparents Day #NationalGrandparentsDay
September 12National Hug Your Hound Day #HugYourHoundDay
September 12National Pet Memorial Day #PetMemorialDay
September 12National Police Woman Day#PoliceWomanDay
September 12National Report Medicare Fraud Day#ReportMedicareFraudDay
September 12National Video Games Day#NationalVideoGamesDay
September 13International Chocolate Day#ChocolateDay
September 13National Boss/Employee Exchange Day#BossEmployeeExchangeDay
September 13National Celiac Disease Awareness Day#CeliacAwarenessDay
September 13National Kids Take Over The Kitchen Day#KidsTakeOverTheKitchenDay
September 13National Peanut Day#NationalPeanutDay
September 13National Programmers Day #ProgrammersDay
September 13Positive Thinking Day#PositiveThinkingDay
September 13Roald Dahl Day#RoaldDahlDay
September 13Uncle Sam Day#UncleSamDay
September 14National Ants On A Log Day#AntsOnALogDay
September 14National Coloring Day#ColoringDay
September 14National Cream-Filled Donut Day#CreamFilledDonutDay
September 14National Eat a Hoagie Day#NationalHoagieDay
September 14National Live Creative Day#LiveCreativeDay
September 15Greenpeace Day#GreenpeaceDay
September 15International Day of Democracy#DayOfDemocracy
September 15International Dot Day#DotDay
September 15Make a Hat Day#MakeAHatDay
September 15National Cheese Toast Day#CheeseToastDay
September 15National Creme de Menthe Day#CremeDeMentheDay
September 15National Double Cheeseburger Day #DoubleCheeseburgerDay
September 15National Felt Hat Day#NationalFeltHatDay
September 15National Linguine Day#NationalLinguineDay
September 15National Online Learning Day#OnlineLearningDay
September 15National School Backpack Awareness Day#SchoolBackpackAwarenessDay
September 15National Tackle Kids Cancer Day#TackleKidsCancerDay
September 16Anne Bradstreet Day#AnneBradstreetDay
September 16International Day for the Preservation of the Ozone Layer#DayForThePreservationOfTheOzoneLayer
September 16Mayflower Day#MayflowerDay
September 16National Cinnamon Raisin Bread Day#CinnamonRaisinBreadDay
September 16National Guacamole Day#GuacamoleDay
September 16National Play-Doh Day #NationalPlayDohDay
September 16National Stepfamily Day#NationalStepFamilyDay
September 16National Tattoo Story Day#TattooStoryDay
September 16National Working Parents Day#WorkingParentsDay
September 16Stay Away From Seattle Day#StayAwayFromSeattleDay
September 17Constitution Day and Citizenship Day#ConstitutionDay #CitizenshipDay
September 17International Grenache Day#GrenacheDay
September 17National Apple Dumpling Day#AppleDumplingDay
September 17National Concussion Awareness Day#ConcussionAwarenessDay
September 17National Monte Cristo Day#MonteCristoDay
September 17National POW/MIA Recognition Day#PowMiaRecognitionDay
September 17National Professional House Cleaners Day #ProfessionalHouseCleanersDay
September 17National Table Shuffleboard Day#TableShuffleboardDay
September 17National Tradesmen Day#TradesmenDay
September 17Time's Up Day#TimesUpDay
September 17World Patient Safety Day#PatientSafetyDay
September 18Big Whopper Liar Day#BigWhopperLiarDay
September 18Chiropractic Founders Day#ChiropracticFoundersDay
September 18Hug A Greeting Card Writer Day#HugAGreetingCardWriterDay
September 18International Coastal Cleanup Day#CoastalCleanupDay
September 18International Eat An Apple Day#EatAnAppleDay
September 18International Red Panda Day#RedPandaDay
September 18Locate An Old Friend Day#LocateAnOldFriendDay
September 18National Cheeseburger Day #NationalCheeseburgerDay
September 18National Clean Up Day#CleanupDay
September 18National Dance Day#DanceDay
September 18National First Love Day#FirstLoveDay
September 18National Gymnastics Day#GymnasticsDay
September 18National Gymnastics Day#GymnasticsDay
September 18National HIV/AIDS and Aging Awareness Day#HivAidsAndAgingAwarenessDay
September 18National Respect Day#RespectDay
September 18Puppy Mill Awareness Day#PuppyMillAwarenessDay
September 18Responsible Dog Ownership Day#ResponsibleDogOwnershipDay
September 18Rice Krispies Treats Day#RiceKrispiesTreatsDay
September 18World Water Monitoring Day#WaterMonitoringDay
September 19International Talk Like A Pirate Day#TalkLikeAPirateDay
September 19National Butterscotch Pudding Day#ButterscotchPuddingDay
September 19National Woman Road Warrior Day#WomanRoadWarriorDay
September 19Wife Appreciation Day#WifeAppreciationDay
September 20National Fried Rice Day#NationalFriedRiceDay
September 20National Pepperoni Pizza Day#PepperoniPizzaDay
September 20National Punch Day#NationalPunchDay
September 20National String Cheese Day#NationalStringCheeseDay
September 21Batman Day#BatmanDay
September 21Get Ready Day#GetReadyDay
September 21International Day of Peace#DayOfPeace
September 21IT Professionals Day#ItProfessionalsDay
September 21Miniature Golf Day#MiniatureGolfDay
September 21National Chai Day #NationalChaiDay
September 21National Pecan Cookie Day#NationalPecanCookieDay
September 21World's Alzheimer's Day#AlzheimersDay
September 22Business Women's Day#BusinessWomensDay
September 22Chainmail Day#ChainmailDay
September 22Dear Diary Day#DearDiaryDay
September 22Elephant Appreciation Day#ElephantAppreciationDay
September 22Hobbit Day#HobbitDay
September 22International Day of Radiant Peace#DayOfRadiantPeace
September 22National Centenarian’s Day#CentenariansDay
September 22National Falls Prevention Awareness Day#FallsPreventionAwarenessDay
September 22National Girls’ Night In Day#GirlsNightInDay
September 22National Ice Cream Cone Day#IceCreamConeDay
September 22National White Chocolate Day#WhiteChocolateDay
September 23Celebrate Bisexuality Day#CelebrateBisexualityDay
September 23Innergize Day#InnergizeDay
September 23International Day of Sign Languages#DayOfSignLanguages
September 23National Checkers Day#NationalCheckersDay
September 23National Dogs in Politics Day#DogsInPoliticsDay
September 23National Great American Pot Pie Day#GreatAmericanPotPieDay
September 23National Snack Stick Day#NationalSnackStickDay
September 23National Teal Talk Day#TealTalkDay
September 23Remember Me Thursday#RememberMeThursday
September 23Restless Legs Awareness Day#RestlessLegsAwarenessDay
September 24Bluebird of Happiness Day#BluebirdOfHappinessDay
September 24Hug A Vegetarian Day / Hug a Vegan#HugAVegetarianDay #HugAVeganDay
September 24Love Note Day#LoveNoteDay
September 24National BRAVE Day#BraveDay
September 24National Cherries Jubilee Day #CherriesJubileeDay
September 24National Punctuation Day#NationalPunctuationDay
September 24Save The Koala Day#SaveTheKoalaDay
September 24Schwenkfelder Thanksgiving#SchwenkfelderThanksgiving
September 24Support Purple for Platelets Day#SportPurpleForPlateletsDay
September 25Family Health and Fitness Day USA#FamilyHealthAndFitnessDayUsa
September 25Fish Amnesty Day#FishAmnestyDay
September 25International Ataxia Awareness Day#AtaxiaAwarenessDay
September 25International Lace Day#LaceDay
September 25International Rabbit Day#RabbitDay
September 25Math Storytelling Day#MathStoryTellingDay
September 25Museum Day#MuseumDay
September 25National Comic Book Day#NationalComicBookDay
September 25National Cooking Day#CookingDay
September 25National Ghost Hunting Day#GhostHuntingDay
September 25National Hunting and Fishing Day#HuntingAndFishingDay
September 25National Lobster Day#NationalLobsterDay
September 25National One-Hit Wonder Day#OneHitWonderDay
September 25National Psychotherapy Day#PsychotherapyDay
September 25National Public Lands Day#PublicLandsDay
September 25National Research Administrator Day#ResearchAdministratorDay
September 25National Seat Check Saturday#SeatCheckSaturday
September 25National Singles Day#SinglesDay
September 25National Tune-Up Day#NationalTuneUpDay
September 25Native American Day#NativeAmericanDay
September 25R.E.A.D. in America Day#READInAmericaDay
September 25Save Your Photos Day#SaveYourPhotosDay
September 26Daughter's Day#DaughtersDay
September 26Gold Star Mother's Day#GoldStarMothersDay
September 26Mesothelioma Awareness Day#MesotheliomaAwarenessDay
September 26National Better Breakfast Day#BetterBreakfastDay
September 26National Compliance Officer Day#ComplianceOfficerDay
September 26National Dumpling Day#NationalDumplingDay
September 26National Johnny Appleseed Day#JohnnyAppleseedDay
September 26National Pancake Day#NationalPancakeDay
September 26National Shamu the Whale Day#ShamuTheWhaleDay
September 26National Situational Awareness Day#NationalSituationalAwarenessDay
September 26World Day of The Deaf#WorldDeafDay
September 27Ancestor Appreciation Day#AncestorAppreciationDay
September 27Family Day#FamilyDay
September 27National Chocolate Milk Day#ChocolateMilkDay
September 27National Corned Beef Hash Day#CornedBeefHashDay
September 27National Crush a Can Day#NationalCrushACanDay
September 27National Gay Men's HIV/AIDS Awareness Day#GayMensHivAidsAwarenessDay
September 27World Tourism Day#TourismDay
September 28Confucius Day#ConfuciusDay
September 28Fish Tank Floorshow Night#FishTankFloorshowNight
September 28International Right To Know Day#RightToKnowDay
September 28National Drink Beer Day#DrinkBeerDay
September 28National Good Neighbor Day#GoodNeighborDay
September 28National Strawberry Cream Pie Day#StrawberryCreamPieDay
September 28National Voter Registration Day#VoterRegistrationDay
September 28World Rabies Day#WorldRabiesDay
September 29National Biscotti Day#BiscottiDay
September 29National Coffee Day#NationalCoffeeDay
September 29National Women’s Health & Fitness Day #WomensHealthFitnessDay
September 29VFW Day#VfwDay
September 29World Heart Day#WorldHeartDay
September 30Ask a Stupid Question Day#AskAStupidQuestionDay
September 30International Blasphemy Rights Day#BlasphemyRightsDay
September 30International Podcast Day#PodcastDay
September 30International Translation Day#TranslationDay
September 30National Chewing Gum Day#ChewingGumDay
September 30National Hot Mulled Cider Day#HotMulledCiderDay
September 30National Love People Day#NationalLovePeopleDay
September 30National Mud Pack Day#MudPackDay
September 30World Maritime Day#MaritimeDay

Social Media Marketing Resources

Want more social media marketing resources and tips?

You’re in luck! 

I have a whole bunch of free content on my website and Youtube channel all about marketing your business. 

To get started, I recommend these three articles: 

And be sure to download my free cheat sheet of 100 Social Media Post Ideas. 

You’re going to love it!

October 2021 Holidays 

The complete list of holidays, observances, and fun, weird, and special dates for October 2021 can be found here:

The access the list of holidays for every month in 2021, visit the 2021 Holidays index page.

Looking for October 2020 Holidays? 

Social Media Just Got Easy

Tackle social media and save HOURS of time and stress with the Social Content App. You’ll get 365 days of Copy-and-Post Content inside a user-friendly mobile app!

Jecara tried it and said: “WOW!! The app didn’t just save me time, but saved me mental strain and the sense of social media overwhelm was ZERO!! I LOVE THIS APP!!”

Daily Post Prompts Social Media Content App

Click here to start your free 7-day trial and see why business owners around the world are raving about the Social Content App.

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By Angie Gensler

Angie Gensler is passionate about teaching entrepreneurs how to grow their business using social media and digital marketing...without the hustle and overwhelm. Angie believes building a business should be fun – not an exhausting whirlwind of sleepless nights and unlimited cups of coffee. Instead, Angie teaches entrepreneurs how to build a business and life they love at their speed, on their time, with their rules.

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