278 Social Media Holidays for Your 2021 Content Calendar [+Template]

Do you celebrate International Cat Day, Pizza Day, or Talk Like a Pirate Day?

There are a plethora of observance days worldwide during which marketers can share content relevant to their industries, get involved in a movement, or simply generate more awareness. But odds are, you probably don’t acknowledge these days until you see your favorite brand posting about it.

These social media “holidays” are a fun way to connect with new and existing followers who share an affinity for a specific food, fictional character, or pet.

While we don’t suggest sharing content on social media and then adding an irrelevant holiday hashtag to it, these holidays can be a chance to promote your brand in a relevant way. Not doing so could cause you to miss valuable opportunities where your brand can join the conversations taking place among members of your target audience.

To help you plan for trending holidays, we created a list that you can bookmark, as well as a downloadable calendar so you can receive automatic reminders.

Downloadable Holiday Calendar

To help you keep track of all these unique holidays, here’s a Social Media Holiday Google Calendar.

Aside from 2021 holidays, we’ve also set dates on the calendar to repeat annually — either on the exact date they occur or the weekday they occur within the month.

Want to finish out your 2021 calendar with some upcoming holiday posts? Tap the + symbol in the lower right-hand corner of the calendar below to add it to your own Google calendar.

Use the Above Template to Plan Out Your Social Media Holiday Posts

National & Global Holiday Calendar: 2021

The list isn’t exhaustive (there are a lot of food-specific holidays out there), and these dates and hashtags may still be subject to change. But this is a great starting point for social media marketers who want to learn more about what’s trending and how they can plan their content in a way that will be fun and engaging on social platforms.

January 2021 Social Media Holidays
February 2021 Social Media Holidays
March 2021 Social Media Holidays
April 2021 Social Media Holidays
May 2021 Social Media Holidays
June 2021 Social Media Holidays
July 2021 Social Media Holidays
August 2021 Social Media Holidays
September 2021 Social Media Holidays
October 2021 Social Media Holidays
November 2021 Social Media Holidays
December 2021 Social Media Holidays

January 2021 Social Media Holidays

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January 1: New Year’s Day #NewYearsDay
January 2: Science Fiction Day #ScienceFictionDay
January 4: National Trivia Day #NationalTriviaDay
January 5: National Bird Day #NationalBirdDay
January 11: Human Trafficking Awareness Day #HumanTraffickingDay
January 11: Clean Off Your Desk Day #CleanOffYourDeskDay
January 13: National Sticker Day #NationalStickerDay
January 15: National Hat Day #NationalHatDay
January 18: Martin Luther King, Jr. Day (Third Monday of January) #MLKDay
January 20: Cheese Lovers Day #CheeseLoversDay
January 21: National Hugging Day #NationalHuggingDay
January 21: Get to Know Your Customers Day (third Thursday of every quarter) #GetToKnowYourCustomersDay
January 24: National Compliment Day #NationalComplimentDay
January 25: Opposite Day #OppositeDay
January 25: Community Manager Appreciation Day (Last Monday of January) #CMAD
January 28: Data Privacy Day #PrivacyAware

February 2021 Social Media Holidays

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February 1 – 28: Black History Month
February 2: Groundhog Day #GroundhogDay
February 2: World Wetlands Day #WorldWetlandsDay
February 4: World Cancer Day #WorldCancerDay
February 5: National Weatherperson’s Day #NationalWeatherpersonsDay
February 7: Super Bowl LV (Varies each year based on the U.S. Football season) #SBLV #SuperBowlSunday #SuperBowl
February 7: National Send a Card to a Friend Day #SendACardToAFriendDay
February 8: National Boy Scouts Day #BoyScoutsDay
February 9: National Pizza Day #NationalPizzaDay
February 9: Safer Internet Day #SID2021
February 11: Inventors Day #InventorsDay
February 12: Chinese New Year #ChineseNewYear
February 13: World Radio Day #WorldRadioDay
February 14: Valentine’s Day #ValentinesDay
February 15: Presidents Day (Third Monday of February) #PresidentsDay
February 16: Mardi Gras #MardiGras
February 17: Random Acts of Kindness Day #RandomActsOfKindnessDay
February 18: National Battery Day #NationalBatteryDay
February 20: World Day of Social Justice #SocialJusticeDay
February 20: Love Your Pet Day #LoveYourPetDay
February 21: International Mother Language Day #IMLD

March 2021 Social Media Holidays

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March 2: National Read Across America Day #ReadAcrossAmerica & #DrSeuss
March 3: World Wildlife Day #WorldWildlifeDay
March 4: National Grammar Day #NationalGrammarDay
March 5: National Employee Appreciation Day (First Friday of March) #EmployeeAppreciationDay
March 5: National Day of Unplugging (First Friday of March) #NationalDayOfUnplugging
March 6: National Dentist’s Day #DentistsDay
March 7: National Be Heard Day #NationalBeHeardDay
March 7: National Cereal Day #NationalCerealDay
March 8: International Women’s Day #BeBoldForChange
March 8: National Proofreading Day #NationalProofreadingDay
March 10: National Pack Your Lunch Day #NationalPackYourLunchDay
March 10: National Women and Girls HIV/AIDS Awareness Day #NWGHAAD
March 11: National Worship of Tools Day #WorshipOfToolsDay
March 11: Popcorn Lover’s Day #PopcornLoversDay
March 12: National Girl Scout Day #GirlScoutDay
March 14: Potato Chip Day #NationalPotatoChipDay
March 14: Pi Day #PiDay (To go the extra mile, post this at 1:59, as Pi equals 3.14159…)
March 14: Daylight Savings #DaylightSavings
March 15: National Napping Day #NationalNappingDay
March 15: World Consumer Rights Day #WorldConsumerRightsDay
March 16: National Freedom of Information Day #FreedomOfInformationDay
March 17: St. Patrick’s Day #StPatricksDay
March 18: Awkward Moments Day #NationalAwkwardMomentsDay
March 19: National Let’s Laugh Day #NationalLetsLaughDay
March 19: World Sleep Day #WorldSleepDay
March 19: Red Nose Day #RedNoseDay
March 20: International Day of Happiness #InternationalDayofHappiness
March 20: World Storytelling Day #WorldStorytellingDay
March 20: First Day of Spring #FirstDayofSpring
March 21: International Day for the Elimination of Racial Discrimination #RacialDiscriminationDay
March 21: World Poetry Day #WorldPoetryDay
March 22: World Water Day #WorldWaterDay
March 23: National Puppy Day #NationalPuppyDay
March 23: American Diabetes Association Alert Day #AmericanDiabetesAssociationAlertDay
March 25: Tolkien Reading Day #TolkienReadingDay
March 26: National Spinach Day #NationalSpinachDay
March 26: Purple Day #PurpleDay
March 27: Earth Hour Day #EarthHour
March 30: Doctor’s Day #NationalDoctorsDay
March 30: National Take a Walk in the Park Day #NationalWalkInTheParkDay
March 31: World Backup Day #WorldBackupDay
March 31: Transgender Day of Visibility #TDOV
March 31: Equal Pay Day #EqualPayDay

April 2021 Social Media Holidays

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April 1 – 30: National Stress Awareness Month
April 1: April Fools Day #AprilFools
April 2: World Autism Awareness Day #WAAD
April 3: Find a Rainbow Day #FindARainbowDay
April 4: Hug a Newsperson Day #HugANewsperson
April 5: World Health Day #LetsTalk
April 6: National Walking Day #NationalWalkingDay
April 10: National Siblings Day #NationalSiblingsDay
April 10: Encourage a Young Writer Day #EncourageAYoungWriterDay
April 11: National Pet Day #NationalPetDay
April 12: International Day of Human Space Flight #InternationalDayOfHumanSpaceFlight
April 15: National Tax Day #TaxDay
April 15: Get to Know Your Customers Day (third Thursday of every quarter) #GetToKnowYourCustomersDay
April 15: National High-Five Day #NH5D
April 16: National Stress Awareness Day #StressAwarenessDay
April 16: National Wear Your Pajamas to Work Day #PJDay
April 17: Haiku Poetry Day #HaikuPoetryDay
April 18: National Columnists’ Day #NationalColumnistDay
April 20: National Look-Alike Day #NationalLookAlikeDay
April 21: National Administrative Professionals Day #AdministrativeProfessionalsDay
April 22: Earth Day #EarthDay2021
April 23: National Take Our Daughters and Sons to Work Day #COUNTONME
April 23: National Picnic Day #NationalPicnicDay
April 23: World Book Day #WorldBookDay
April 23: Arbor Day #ArborDay
April 25: National Telephone Day #NationalTelephoneDay
April 25: World Malaria Day #EndMalariaForGood
April 28: Denim Day #DenimDay
April 29: International Dance Day #InternationalDanceDay
April 30: National Honesty Day #NationalHonestyDay
April 30: National Adopt a Shelter Pet Day #AdoptAShelterPetDay
April 30: International Jazz Day #JazzDay

May 2021 Social Media Holidays

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May 1: May Day #MayDay
May 1: International Workers Day #IntWorkersDay
May 3: World Press Freedom Day #WPFD2021 #PressFreedom
May 4: Star Wars Day #StarWarsDay & #Maythe4thBeWithYou
May 4: International Firefighters Day #InternationalFirefightersDay
May 4: World Asthma Day #WorldAsthmaDay
May 4: Thank a Teacher Day #ThankATeacher
May 5: Cinco de Mayo #CincoDeMayo
May 6: National Nurses Day #NursesDay
May 7: World Password Day #WorldPasswordDay
May 7: Space Day #SpaceDay
May 9: Europe Day #EuropeDay
May 9: Mother’s Day #MothersDay
May 12: National Limerick Day #NationalLimerickDay
May 12: National Receptionist Day #NationalReceptionistDay
May 15: International Day of Families #FamilyDay
May 16: Love a Tree Day #LoveATreeDay
May 17: International Day Against Homophobia and Transphobia #IDAHOT2021
May 21: National Memo Day #NationalMemoDay
May 21: National Bike to Work Day #BTWD
May 21: Endangered Species Day #EndangeredSpeciesDay
May 24: National Scavenger Hunt Day #NationalScavengerHuntDay
May 28: Hamburger Day #NationalHamburgerDay
May 28: Heat Awareness Day (Last Friday of May) #NoFryDay
May 29: Paperclip Day #PaperclipDay
May 31: Memorial Day (Fourth Monday of May) #MemorialDay #MDW
May 31: World No-Tobacco Day #NoTobacco

June 2021 Social Media Holidays

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June 1: Global Day of Parents #GlobalDayOfParents
June 4: National Donut Day #NationalDonutDay
June 5: World Environment Day #WorldEnvironmentDay
June 6: National Cancer Survivor’s Day #NCSD2021
June 6: Higher Education Day #HigherEducationDay
June 8: World Oceans Day #WorldOceansDay
June 8: Best Friends Day #BestFriendsDay
June 13: International Children’s Day #ChildrensDay
June 14: World Blood Donor Day #GiveBlood
June 14: National Flag Day #FlagDay
June 19: Juneteenth (Freedom Day) #Juneteenth
June 20: World Refugee Day #WithRefugees
June 20: First Day of Summer
June 20: Father’s Day #FathersDay
June 21: National Selfie Day #NationalSelfieDay
June 21: World Music Day #WorldMusicDay
June 21: International Yoga Day #InternationalYogaDay
June 24: National Handshake Day #HandshakeDay
June 25: Take Your Dog to Work Day #TakeYourDogToWorkDay
June 27: National Sunglasses Day #NationalSunglassesDay
June 30: Social Media Day #SMDay

July 2021 Social Media Holidays

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July 1: National Postal Worker Day #NationalPostalWorkerDay
July 2: World UFO Day #WorldUFODay
July 4: Independence Day (United States)
July 7: World Chocolate Day #WorldChocolateDay
July 11: Cheer Up the Lonely Day #CheerUpTheLonelyDay
July 12: Malala Day #MalalaDay
July 15: Give Something Away Day #GiveSomethingAwayDay
July 15: Get to Know Your Customers Day #GetToKnowYourCustomersDay
July 17: World Emoji Day #WorldEmojiDay
July 18: Nelson Mandela International Day #MandelaDay
July 30: Talk in an Elevator Day #TalkInAnElevatorDay
July 30: International Day of Friendship #DayOfFriendship

August 2021 Social Media Holidays

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August 1: Respect for Parents Day #RespectForParentsDay
August 2: National Coloring Book Day #NationalColoringBookDay
August 8: International Cat Day #InternationalCatDay
August 9: National Book Lovers Day #NationalBookLoversDay
August 10: National Lazy Day #LazyDay
August 11: National Sons and Daughters Day #SonsAndDaughtersDay
August 12: International Youth Day #YouthDay
August 12: World Elephant Day #WorldElephantDay
August 13: International Lefthanders Day #LefthandersDay
August 15: National Relaxation Day #NationalRelaxationDay
August 16: National Tell a Joke Day #NationalTellAJokeDay
August 19: World Photo Day #WorldPhotoDay
August 19: World Humanitarian Day #WorldHumanitarianDay
August 20: National Lemonade Day #NationalLemonadeDay
August 26: National Dog Day #NationalDogDay
August 26: National Women’s Equality Day #WomensEqualityDay

September 2021 Social Media Holidays

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September 4: National Wildlife Day #NationalWildlifeDay
September 5: International Day of Charity #CharityDay
September 6: Labor Day #LaborDay
September 6: Read a Book Day #ReadABookDay
September 8: International Literacy Day #LiteracyDay
September 10: Stand Up To Cancer Day #KissCancerGoodbye
September 11: National Day of Service and Remembrance #911Day
September 12: Civic Day of Hacking #HackForChange
September 12: National Grandparents Day #NationalGrandparentsDay
September 12: National Day of Encouragement #DayOfEncouragement
September 12: National Video Games Day #NationalVideoGamesDay
September 15 – October 15: Hispanic Heritage Month #hispanicheritagemonth
September 19: Talk Like a Pirate Day #TalkLikeAPirateDay
September 21: International Day of Peace #PeaceDay
September 21: Miniature Golf Day #MiniGolfDay
September 22: Car-Free Day #CarFreeDay
September 22: Hobbit Day #HobbitDay
September 22: First Day of Fall
September 26: National Pancake Day #NationalPancakeDay
September 26: European Day of Languages #EDL2021
September 27: World Tourism Day #WTD2021
September 28: World Rabies Day #WorldRabiesDay
September 28: National Good Neighbor Day #GoodNeighborDay
September 29: National Women’s Health and Fitness Day #FitnessDay
September 30: International Podcast Day #InternationalPodcastDay

October 2021 Social Media Holidays

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October 1: International Day of Older Persons #UNDOP
October 1: International Coffee Day #InternationalCoffeeDay
October 1: World Vegetarian Day #WorldVegetarianDay
October 1: World Smile Day #WorldSmileDay
October 2: International Day of Nonviolence #InternationalDayOfNonviolence
October 3: National Techies Day #TechiesDay
October 4: World Animal Day #WorldAnimalDay
October 4: National Taco Day #NationalTacoDay
October 4: World Habitat Day #WorldHabitatDay
October 5: World Teachers Day #WorldTeachersDay
October 10: World Mental Health Day #WorldMentalHeathDay
October 11: International Day of the Girl #DayOfTheGirl
October 14: World Sight Day #WorldSightDay
October 14: National Dessert Day #DessertDay
October 15: Global Handwashing Day #GlobalHandwashingDay
October 16: World Food Day #FoodDay
October 16: Bosses Day #BossesDay
October 17: International Day for the Eradication of Poverty #EndPoverty
October 20: World Statistics Day #StatisticsDay
October 21: Reptile Awareness Day #ReptileAwarenessDay
October 21: Get to Know Your Customers Day (third Thursday of every quarter) #GetToKnowYourCustomersDay
October 24: United Nations Day #UNDay
October 25: Greasy Foods Day #GreasyFoodsDay
October 30: National Publicist Day #NationalPublicistDay
October 30: Checklist Day #ChecklistDay
October 31: Halloween #Halloween

November 2021 Social Media Holidays

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November 1: World Vegan Day #WorldVeganDay
November 1: National Authors Day #NationalAuthorsDay
November 1: National Cook For Your Pets Day #CookForYourPetsDay
November 3: National Sandwich Day #NationalSandwichDay
November 4: National Candy Day #NationalCandyDay
November 7: Daylight Saving Time Ends #DaylightSavings
November 8: National Cappuccino Day #CappuccinoDay
November 8: Science, Technology, Engineering, and Medicine (STEM) Day #STEMDay
November 11: Veterans Day #VeteransDay
November 13: World Kindness Day #WKD
November 14: World Diabetes Day #WDD
November 15: Clean Out Your Refrigerator Day #CleanOutYourRefrigeratorDay
November 15: America Recycles Day #BeRecycled
November 16: International Day for Tolerance #ToleranceDay
November 16: National Entrepreneurs Day #EntrepreneursDay
November 17: International Students Day #InternationalStudentsDay
November 19: International Men’s Day #InternationalMensDay
November 20: Universal Children’s Day #UNChildrensDay
November 21: World Hello Day #WorldHelloDay
November 25: Thanksgiving Day #Thanksgiving
November 26: National Cake Day #NationalCakeDay
November 26: National Day of Listening #DayOfListening
November 27: Small Business Saturday (The last Saturday of November) #ShopSmall
November 29: Electronic Greeting Card Day #ElectronicGreetingCardDay
November 30: Computer Security Day #ComputerSecurityDay

December 2021 Social Media Holidays

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December 1: World AIDS Day #WAD2021
December 3: International Day of Persons with Disabilities #IDPWD
December 4: National Cookie Day #NationalCookieDay
December 5: World Soil Day #WorldSoilDay
December 6: Microwave Oven Day #MicrowaveOvenDay
December 8: Pretend to Be a Time Traveler Day #PretendToBeATimeTravelerDay
December 10: Human Rights Day #HumanRightsDay
December 10: Nobel Prize Day #NobelPrize
December 10: National Salesperson Day #SalespersonDay
December 11: International Mountain Day #InternationalMountainDay
December 21: Crossword Puzzle Day #CrosswordPuzzleDay
December 21: First Day of Winter #WinterSolstice
December 27: No Interruptions Day #NoInterruptionsDay
December 31: New Year’s Eve #NYE

Sources: National Day Calendar, Sprout Social, TrackMaven, Holiday Insights, Brownielocks, National Peace Corps Association, Sparkflow, There’s a Day for That

Editor’s Note: This post was originally published in January 2017 but is updated annually for comprehensiveness. The most recent update of this post was March 2021.