Whether it's International Cat Day, Pizza Day, or Talk Like a Pirate Day, it seems like the internet is celebrating a holiday almost every day.
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Odds are, you don't celebrate all of these social media holidays. Think about it. When was the last time you saw an obscure holiday or observance day trending and thought to yourself "Yup, I'm celebrating that"?
Some of these holidays might be simply too silly for your brand to engage with. But despite all of the oddities, social media managers are always eyeing trends and holidays that they can leverage for brand awareness.
While we certainly don't suggest sharing content on social media and then tacking on a completely irrelevant hashtag on it, you should still take some time to recognize the brand opportunities that could come your way in the next year.
By ignoring all of the holiday opportunities you could be taking, you could be missing valuable opportunities to take advantage of trending topics with fun and relevant "holiday" content on social media.
From food to politics to animals and everything in between, there is 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.
To help you plan for trending holidays, we created a list that you can bookmark, as well as a downloadable calendar so you can get automatic reminders.
Downloadable Holiday Calendar
To help you keep track of all the 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 righthand corner of the calendar below to add it to your own Google calendar.
Reminder, click the plus sign below to add it to your own Google Calendar list.
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 Twitter and other social platforms.
- January 2021
- February 2021
- March 2021
- April 2021
- May 2021
- June 2021
- July 2021
- August 2021
- September 2021
- October 2021
- November 2021
- December 2021
January 2021
1. Friday, New Year's Day #NewYearsDay
2. Saturday, Science Fiction Day #ScienceFictionDay
4. Monday, National Trivia Day #NationalTriviaDay
5. Tuesday, National Bird Day #NationalBirdDay
11. Monday, Human Trafficking Awareness Day #HumanTraffickingDay
11. Monday, Clean Off Your Desk Day #CleanOffYourDeskDay
13. Wednesday, National Sticker Day #NationalStickerDay
15. Friday, National Hat Day #NationalHatDay
18. Monday, Martin Luther King, Jr. Day (Third Monday of January) #MLKDay
20. Wednesday, Cheese Lovers Day #CheeseLoversDay
21. Thursday, National Hugging Day #NationalHuggingDay
21. Thursday, Get to Know Your Customers Day (third Thursday of every quarter) #GetToKnowYourCustomersDay
23. Saturday, National Pie Day #PieDay
24. Sunday, National Compliment Day #NationalComplimentDay
25. Monday, Opposite Day #OppositeDay
25. Monday, Community Manager Appreciation Day (Last Monday of January) #CMAD
28. Thursday, Data Privacy Day #PrivacyAware
February 2021
2. Tuesday, Groundhog Day #GroundhogDay
2. Tuesday, World Wetlands Day #WorldWetlandsDay
4. Thursday, World Cancer Day #WorldCancerDay
5. Friday, National Weatherperson’s Day #NationalWeatherpersonsDay
7. Sunday, Super Bowl LV (Varies each year based on the U.S. Football season) #SBLV #SuperBowlSunday #SuperBowl
7. Sunday, National Send a Card to a Friend Day #SendACardToAFriendDay
8. Monday, National Boy Scouts Day #BoyScoutsDay
9. Tuesday, National Pizza Day #NationalPizzaDay
11. Thursday, Safer Internet Day #SID2021
11. Thursday, Inventors Day #InventorsDay
12. Friday, Chinese New Year #ChineseNewYear
13. Saturday, World Radio Day #WorldRadioDay
14. Sunday, Valentine's Day #ValentinesDay
15. Monday, Presidents Day (Third Monday of February) #PresidentsDay
16. Tuesday, Mardi Gras #MardiGras
17. Wednesday, Random Acts of Kindness Day #RandomActsOfKindnessDay
18. Thursday, National Battery Day #NationalBatteryDay
20. Saturday, World Day of Social Justice #SocialJusticeDay
20. Saturday, Love Your Pet Day #LoveYourPetDay
21. Sunday, International Mother Language Day #IMLD
March 2021
2. Tuesday, National Read Across America Day #ReadAcrossAmerica & #DrSeuss
3. Wednesday, World Wildlife Day #WorldWildlifeDay
4. Thursday, National Grammar Day #NationalGrammarDay
5. Friday, National Employee Appreciation Day (First Friday of March) #EmployeeAppreciationDay
5. Friday, National Day of Unplugging (First Friday of March) #NationalDayOfUnplugging
6. Saturday, National Dentist's Day #DentistsDay
7. Sunday, National Be Heard Day #NationalBeHeardDay
7. Sunday, National Cereal Day #NationalCerealDay
8. Monday, International Women's Day #BeBoldForChange
8. Monday, National Proofreading Day #NationalProofreadingDay
9. Tuesday, National Napping Day #NationalNappingDay
10. Wednesday, National Pack Your Lunch Day #NationalPackYourLunchDay
10. Wednesday, National Women and Girls HIV/AIDS Awareness Day #NWGHAAD
11. Thursday, National Worship of Tools Day #WorshipOfToolsDay
12: Friday, National Girl Scout Day #GirlScoutDay
12. Friday, Popcorn Lover's Day #PopcornLoversDay
14. Sunday, Potato Chip Day #NationalPotatoChipDay
14. Sunday, Pi Day #PiDay (To go the extra mile, post this at 1:59, as Pi equals 3.14159...)
15. Monday, World Consumer Rights Day #WorldConsumerRightsDay
16. Tuesday, National Freedom of Information Day #FreedomOfInformationDay
17. Wednesday, St. Patrick's Day #StPatricksDay
18. Thursday, Awkward Moments Day #NationalAwkwardMomentsDay
19. Friday, National Let's Laugh Day #NationalLetsLaughDay
19. Friday, World Sleep Day #WorldSleepDay
19. Friday, Red Nose Day #RedNoseDay
20. Saturday, International Day of Happiness #InternationalDayofHappiness
20. Saturday, World Storytelling Day #WorldStorytellingDay
20. Saturday, First Day of Spring #FirstDayofSpring
21. Sunday, Daylight Savings #DaylightSavings
21. Sunday, International Day for the Elimination of Racial Discrimination #RacialDiscriminationDay
21. Sunday, World Poetry Day #WorldPoetryDay
22: Monday, World Water Day #WorldWaterDay
23. Tuesday, National Puppy Day #NationalPuppyDay
23. Tuesday, American Diabetes Association Alert Day #AmericanDiabetesAssociationAlertDay
25. Thursday, Tolkien Reading Day #TolkienReadingDay
26. Friday, National Spinach Day #NationalSpinachDay
26. Friday, Purple Day #PurpleDay
27. Saturday, Earth Hour Day #EarthHour
30. Tuesday, Doctor's Day #NationalDoctorsDay
30. Tuesday, National Take a Walk in the Park Day #NationalWalkInTheParkDay
31. Wednesday, World Backup Day #WorldBackupDay
31. Wednesday, Transgender Day of Visibility #TDOV
April 2021
1. Thursday, April Fools Day #AprilFools
2. Friday, World Autism Awareness Day #WAAD
3. Saturday, Find a Rainbow Day #FindARainbowDay
4. Sunday, Hug a Newsperson Day #HugANewsperson
7. Wednesday, World Health Day #LetsTalk
7. Wednesday, National Walking Day #NationalWalkingDay
10. Saturday, National Siblings Day #NationalSiblingsDay
10. Saturday, Encourage a Young Writer Day #EncourageAYoungWriterDay
11. Sunday, National Pet Day #NationalPetDay
12. Monday, International Day of Human Space Flight #InternationalDayOfHumanSpaceFlight
13. Tuesday, Equal Pay Day #EqualPayDay
15. Thursday, National Tax Day #TaxDay
15. Thursday, Get to Know Your Customers Day (third Thursday of every quarter) #GetToKnowYourCustomersDay
16. Friday, National High-Five Day #NH5D
16. Friday, National Stress Awareness Day #StressAwarenessDay
16. Friday, National Wear Your Pajamas to Work Day #PJDay
17. Saturday, Haiku Poetry Day #HaikuPoetryDay
18. Sunday, National Columnists' Day #NationalColumnistDay
20. Tuesday, National Look-Alike Day #NationalLookAlikeDay
22. Thursday, Earth Day #EarthDay2021
23. Friday, National Picnic Day #NationalPicnicDay
23. Friday, World Book Day #WorldBookDay
23. Friday, Arbor Day #ArborDay
25. Sunday, National Telephone Day #NationalTelephoneDay
25. Sunday, World Malaria Day #EndMalariaForGood
25. Sunday, National Take Our Daughters and Sons to Work Day #COUNTONME
28. Wednesday, National Administrative Professionals Day #AdministrativeProfessionalsDay
29. Thursday, International Dance Day #InternationalDanceDay
29. Thursday, Denim Day #DenimDay
30. Friday, National Honesty Day #NationalHonestyDay
30. Friday, National Adopt a Shelter Pet Day #AdoptAShelterPetDay
30. Friday, International Jazz Day #JazzDay
May 2021
1. Saturday, May Day #MayDay
1. Saturday, International Workers Day #IntWorkersDay
3. Monday, World Press Freedom Day #WPFD2021 #PressFreedom
4. Tuesday, Star Wars Day #StarWarsDay & #Maythe4thBeWithYou
4. Tuesday, International Firefighters Day #InternationalFirefightersDay
4. Tuesday, World Asthma Day #WorldAsthmaDay
5. Wednesday, Cinco de Mayo #CincoDeMayo
5. Wednesday, Thank a Teacher Day #ThankATeacher
6. Thursday, National Nurses Day #NursesDay
6. Thursday, World Password Day #WorldPasswordDay
7. Friday, Space Day #SpaceDay
9. Sunday, Europe Day #EuropeDay
10. Monday, Mother's Day #MothersDay
12. Wednesday, National Limerick Day #NationalLimerickDay
12. Wednesday, National Receptionist Day #NationalReceptionistDay
15. Saturday, International Day of Families #FamilyDay
15. Saturday, National Bike to Work Day #BTWD
15. Saturday, Endangered Species Day #EndangeredSpeciesDay
16. Sunday, Love a Tree Day #LoveATreeDay
17. Monday, International Day Against Homophobia and Transphobia #IDAHOT2021
21. Friday, National Memo Day #NationalMemoDay
24. Monday, National Scavenger Hunt Day #NationalScavengerHuntDay
24. Monday, Memorial Day (Fourth Monday of May) #MemorialDay #MDW
28. Friday, Hamburger Day #NationalHamburgerDay
28. Friday, Heat Awareness Day (Last Friday of May) #NoFryDay
29. Saturday, Paperclip Day #PaperclipDay
31. Monday, World No-Tobacco Day #NoTobacco
June 2021
1. Tuesday, Global Day of Parents #GlobalDayOfParents
2. Wednesday, Leave The Office Early Day #LeaveTheOfficeEarlyDay
4. Friday, National Donut Day #NationalDonutDay
5. Saturday, World Environment Day #WorldEnvironmentDay
6. Sunday, National Cancer Survivor’s Day #NCSD2021
6. Sunday, Higher Education Day #HigherEducationDay
8. Tuesday, World Oceans Day #WorldOceansDay
8. Tuesday, Best Friends Day #BestFriendsDay
13. Sunday, International Children’s Day #ChildrensDay
14. Monday, World Blood Donor Day #GiveBlood
14. Monday, National Flag Day #FlagDay
20. Sunday, World Refugee Day #WithRefugees
20. Sunday, First Day of Summer
20. Sunday, Father’s Day #FathersDay
21. Monday, National Selfie Day #NationalSelfieDay
21. Monday, World Music Day #WorldMusicDay
21. Monday, International Yoga Day #InternationalYogaDay
24. Thursday, National Handshake Day #HandshakeDay
25. Friday, Take Your Dog to Work Day #TakeYourDogToWorkDay
27. Sunday, National Sunglasses Day #NationalSunglassesDay
30. Wednesday, Social Media Day #SMDay
July 2021
1. Thursday, National Postal Worker Day #NationalPostalWorkerDay
2. Friday, World UFO Day #WorldUFODay
4. Sunday, Independence Day (United States)
7. Wednesday, World Chocolate Day #WorldChocolateDay
11. Sunday, Cheer Up the Lonely Day #CheerUpTheLonelyDay
12. Monday, Malala Day #MalalaDay
15. Thursday, Give Something Away Day #GiveSomethingAwayDay
15. Thursday, Get to Know Your Customers Day #GetToKnowYourCustomersDay
17. Saturday, World Emoji Day #WorldEmojiDay
18. Sunday, Nelson Mandela International Day #MandelaDay
30. Friday, Talk in an Elevator Day #TalkInAnElevatorDay
30. Friday, International Day of Friendship #DayOfFriendship
August 2021
1. Sunday, Respect for Parents Day #RespectForParentsDay
2. Monday, National Coloring Book Day #NationalColoringBookDay
8. Sunday, International Cat Day #InternationalCatDay
9. Monday, National Book Lovers Day #NationalBookLoversDay
10. Wednesday, National Lazy Day #LazyDay
10. Wednesday, National Sons and Daughters Day #SonsAndDaughtersDay
12. Thursday, International Youth Day #YouthDay
12. Thursday, World Elephant Day #WorldElephantDay
13. Friday, International Lefthanders Day #LefthandersDay
15. Sunday, National Relaxation Day #NationalRelaxationDay
16. Monday, National Tell a Joke Day #NationalTellAJokeDay
19. Thursday, World Photo Day #WorldPhotoDay
19. Thursday, World Humanitarian Day #WorldHumanitarianDay
20. Friday, National Lemonade Day #NationalLemonadeDay
26. Thursday, National Dog Day #NationalDogDay
26. Thursday, National Women’s Equality Day #WomensEqualityDay
September 2021
Date Varies, Stand Up To Cancer Day #KissCancerGoodbye
4. Saturday, National Wildlife Day #NationalWildlifeDay
5. Sunday, International Day of Charity #CharityDay
5. Sunday, National Grandparents Day #NationalGrandparentsDay
6. Monday, Labor Day #LaborDay
6. Monday, Read a Book Day #ReadABookDay
8. Wednesday, International Literacy Day #LiteracyDay
11. Saturday, National Day of Service and Remembrance #911Day
12. Sunday, National Day of Encouragement #DayOfEncouragement
12. Sunday, National Video Games Day #NationalVideoGamesDay
19. Sunday, Talk Like a Pirate Day #TalkLikeAPirateDay
21. Tuesday, International Day of Peace #PeaceDay
21. Tuesday, Miniature Golf Day #MiniGolfDay
21. Tuesday, Civic Day of Hacking #HackForChange
22. Wednesday, Car-Free Day #CarFreeDay
22. Wednesday, Hobbit Day #HobbitDay
22. Wednesday, First Day of Fall
22. Wednesday, National Women’s Health and Fitness Day #FitnessDay
26. Sunday, National Pancake Day #NationalPancakeDay
26. Sunday, European Day of Languages #EDL2021
27. Monday, World Tourism Day #WTD2021
28. Wednesday, World Rabies Day #WorldRabiesDay
28. Wednesday, National Good Neighbor Day #GoodNeighborDay
30. Thursday, International Podcast Day #InternationalPodcastDay
October 2021
1. Friday, International Day of Older Persons #UNDOP
1. Friday, International Coffee Day #InternationalCoffeeDay
1. Friday, World Vegetarian Day #WorldVegetarianDay
2. Saturday, International Day of Nonviolence #InternationalDayOfNonviolence
2. Saturday, World Smile Day #WorldSmileDay
3. Sunday, National Techies Day #TechiesDay
4. Monday, World Animal Day #WorldAnimalDay
4. Monday, National Taco Day #NationalTacoDay
4. Monday, World Teachers Day #WorldTeachersDay
4. Monday, World Habitat Day #WorldHabitatDay
10. Sunday, World Mental Health Day #WorldMentalHeathDay
10. Sunday, World Sight Day #WorldSightDay
11. Monday, International Day of the Girl #DayOfTheGirl
14. Thursday, National Dessert Day #DessertDay
15. Friday, Global Handwashing Day #GlobalHandwashingDay
16. Saturday, World Food Day #FoodDay
16. Saturday, Bosses Day #BossesDay
17. Sunday, International Day for the Eradication of Poverty #EndPoverty
20. Wednesday, World Statistics Day #StatisticsDay
21. Thursday, Reptile Awareness Day #ReptileAwarenessDay
24. Sunday, United Nations Day #UNDay
25. Monday, Greasy Foods Day #GreasyFoodsDay
30. Saturday, National Publicist Day #NationalPublicistDay
30. Saturday, Checklist Day #ChecklistDay
31. Sunday, Halloween #Halloween
November 2021
1. Monday, World Vegan Day #WorldVeganDay
1. Monday, National Authors Day #NationalAuthorsDay
1. Monday, National Cook For Your Pets Day #CookForYourPetsDay
3. Wednesday, National Sandwich Day #NationalSandwichDay
4. Thursday, National Candy Day #NationalCandyDay
7. Sunday, Daylight Saving Time Ends #DaylightSavings
8. Monday, National Cappuccino Day #CappuccinoDay
8. Monday, Science, Technology, Engineering, and Medicine (STEM) Day #STEMDay
11. Thursday, Veterans Day #VeteransDay
13. Saturday, World Kindness Day #WKD
14. Sunday, World Diabetes Day #WDD
15. Monday, Clean Out Your Refrigerator Day #CleanOutYourRefrigeratorDay
15. Monday, America Recycles Day #BeRecycled
16. Tuesday, International Day for Tolerance #ToleranceDay
16. Tuesday, National Entrepreneurs Day #EntrepreneursDay
17. Wednesday, International Students Day #InternationalStudentsDay
19. Friday, International Men’s Day #InternationalMensDay
20. Saturday, Universal Children’s Day #UNChildrensDay
21. Sunday, World Hello Day #WorldHelloDay
25. Thursday, Thanksgiving Day #Thanksgiving
26. Friday, National Cake Day #NationalCakeDay
27. Saturday, Small Business Saturday (The last Saturday of November) #ShopSmall
29. Monday, National Day of Listening #DayOfListening
29. Monday, Electronic Greeting Card Day #ElectronicGreetingCardDay
30. Tuesday, Computer Security Day #ComputerSecurityDay
December 2021
1. Wednesday, World AIDS Day #WAD2021
3. Friday, International Day of Persons with Disabilities #IDPWD
4. Saturday, National Cookie Day #NationalCookieDay
5. Sunday, World Soil Day #WorldSoilDay
6. Monday, Microwave Oven Day #MicrowaveOvenDay
8. Wednesday, Pretend to Be a Time Traveler Day #PretendToBeATimeTravelerDay
10. Friday, Human Rights Day #HumanRightsDay
10. Friday, Nobel Prize Day #NobelPrize
10. Friday, National Salesperson Day #SalespersonDay
11. Saturday, International Mountain Day #InternationalMountainDay
21. Tuesday, Crossword Puzzle Day #CrosswordPuzzleDay
21. Tuesday, First Day of Winter #WinterSolstice
30. Thursday, No Interruptions Day – Last Work Day of the Year #NoInterruptionsDay
31. Friday, New Year’s Eve #NYE
Sources: National Day Calendar, Sprout Social, TrackMaven, Holiday Insights, Brownielocks, National Peace Corps Association, Sparkflow
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 December 2021.
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Originally published Dec 21, 2020 8:03:00 PM, updated December 22 2020
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