As the year draws to a close and 2026 approaches swiftly, excitement fills the air for a season of unwinding, reflection, spending time with loved ones, and celebrating traditions.
Whatever your holiday of choice, we’re proud to mark December as a month of warmth, the promise of new beginnings, and some wholesome social media holidays.
December 1. World AIDS Day #WorldAIDSDay
December 1. Cyber Monday #CyberMonday
December 3. International Day of Persons with Disabilities #IDPWD
December 4. National Cookie Day #NationalCookieDay
December 5. World Soil Day #WorldSoilDay
December 5. International Ninja Day #InternationalNinjaDay
December 8. Pretend to Be a Time Traveler Day #TimeTravelerDay #PretendToBeATimeTravelerDay
December 10. International Human Rights Day #HumanRightsDay
December 10. International Animal Rights Day #AnimalRightsDay
December 10. Nobel Prize Day #NobelPrize
December 11. International Mountain Day #InternationalMountainDay
December 14. Hanukkah Begins #Hanukkah #Chanukah
December 21. First Day of Winter #WinterSolstice
December 23. Festivus #Festivus #AiringOfGrievances
December 24. Christmas Eve #ChristmasEve #MerryChristmas
December 25. Christmas Day #Christmas #MerryChristmas
December 31. New Year’s Eve #NYE #NewYearsEve
December 31. No Interruptions Day #NoInterruptionsDay
Ever thought Santa Claus and ninjas could share common ground? Prepare to be amused as we explore creative ways brands have embraced these holidays to connect with their audience online. Who knows, you might just find a spark of inspiration for your very own campaign.
Key Takeaway
It’s all about humanity and tapping into the human experience, from festive cheer to championing human rights, and championing accessibility for all.
December 1. World AIDS Day #WorldAIDSDay
Established in 1988, the global movement is dedicated to raising awareness of the AIDS pandemic, showing support for those living with the disease and mourning those who have died of it. It’s all about working together to end the stigma… It’s what Gaëtan Dugas would have wanted. We recommend watching this film: Killing Patient Zero, 2019
Content idea: Spotlight an organization driving change in HIV/AIDS research or community care and share ways people can support awareness beyond the day.
December 1. Cyber Monday #CyberMonday
Cyber Monday is the closing act after a weekend of in-store shopping, offering shoppers the chance to make those purchases online at great discounts and convenience.
Content idea: Share a roundup of your team’s favorite online finds or digital tools they can’t live without.
December 3. International Day of Persons with Disabilities #IDPWD
It wasn’t until a TikTok of a deaf man stuck in an elevator, unable to communicate via the emergency helpline, went viral that a lot of online users reckoned with the depth of the challenges that are tied to living with a disability. This UN-sanctioned day mobilizes support for issues relating to the inclusion of people with both visible and invisible disabilities.
Content idea: Feature innovations or advocates making accessibility a reality in your industry.
December 4. National Cookie Day #NationalCookieDay
There’s nothing like a good cookie. Hard on the outside and soft on the inside. From homemade to store-bought options, the only way to celebrate this holiday is by sinking your teeth into cookie goodness.
Content idea: Host a “cookie-off” among your followers or teammates.
December 5. World Soil Day #WorldSoilDay
Loamy, clay, and sandy soil. I still remember this from primary school (although there seem to be more soil types than what we were taught then). Since food makes the world go round and there’s no food without soil, it’s more than necessary to have a day to pay attention to the importance of healthy soil worldwide.
Content idea: Post an infographic on how soil health impacts the food chain.
December 5. International Ninja Day #InternationalNinjaDay
The dream career path of thousands of children around the world, International Ninja Day is the perfect opportunity to honor these stealth and lightning-fast warriors. Fun fact: The holiday was created by a burger restaurant (Ninja Burgers) to celebrate the speed at which their burgers are made and delivered.
Content idea: Play with the theme of stealth and show how your brand “moves in silence” to get things done, whether it’s behind-the-scenes teamwork, unseen craftsmanship, or the quiet efficiency that makes everything click. Bonus points if you share a slow-motion action clip.
December 8. Pretend to Be a Time Traveler Day #TimeTravelerDay #PretendToBeATimeTravelerDay
This social media holiday pretty much speaks for itself. Would you go forward in time to explore the future (maybe we’ll finally get flying cars), or would you travel into the past to witness the genesis of human civilization?
Content idea: Create a fun “time capsule” post: what would your brand want future generations to know about today?
December 10. International Human Rights Day #HumanRightsDay
December 10 this year marks the 77th anniversary of the Universal Declaration of Human Rights, observed by the international community yearly. The principles of freedom, justice, and equality are hallmarks of this holiday.
Content idea: Share an inspiring story or initiative that embodies human rights in action within your community or sector.
December 10. International Animal Rights Day #AnimalRightsDay
Poetically falling on the same day as International Human Rights Day, International Animal Rights Day is a global observance created to defend the belief that non-human beings have the right to a life free from exploitation and suffering. It also recognizes animals as sentient beings who deserve protection just as people do.
Content idea: Highlight a conservation or rescue initiative making a real difference for animals or simply post your favorite team pets.
December 10. Nobel Prize Day #NobelPrize
Aligning with the yearly anniversary of the death of the eponymous Alfred Nobel, this day lauds excellence in diverse fields, recognizing individuals for their outstanding achievements made for the benefit of humanity.
Content idea: Celebrate breakthroughs that have redefined your industry (past or present) and the people driving innovation forward.
December 11. International Mountain Day #InternationalMountainDayInternational
International Mountain Day aims to create a large social movement that amplifies awareness about the significance of mountain ecosystems and key issues regarding these beauties of nature. This ranges from mountain development issues to the effects of pollution and environmental degradation.
Content idea: Post breathtaking mountain photography.
December 14. Hanukkah Begins #Hanukkah #Chanukah
Hanukkah, the Festival of Lights, begins on this day and runs until December 22. The eight-day holiday commemorates the Jewish people's rededication to the Temple, observed with nightly menorah lighting, special prayers, and fried foods.
Content idea: Reflect on what “light” means to your brand or community; hope, creativity, innovation, and share eight small ways to bring more of it into the world this season (one for each night).
@southpark Dreidel, dreidel, dreidel #chagsameach #happyhanukkah #southpark ♬ original sound - South Park
December 21. First Day of Winter #WinterSolstice
Winter officially begins on this day, marked by the shortest day (because it has the fewest hours of sunlight throughout the year) and the longest night experienced in the Northern Hemisphere.
Content idea: Ask your followers to share their favorite cozy rituals or mental health tips for the darker months.
December 23. Festivus #Festivus #AiringOfGrievances
This secular holiday usually stands as an alternative to the pressures of the Christmas and wider holiday season. Instead, Festivus allows you to air out your grievances and get things off your chest. We thank the TV show Seinfield for this marvel (The Strike, 1997, season 9, episode 10).
Content idea: Post a light-hearted “airing of grievances” from your office.
@sony happy festivus! celebrate accordingly #sony #seinfeld #seinfeldtv #seinfeld_clips #festivus @Seinfeld ♬ original sound - Sony
December 24. Christmas Eve #ChristmasEve #MerryChristmas
From the anticipation and the warm hugs to the setting up of presents underneath the Christmas tree (unless you’re waiting for Santa to work his magic), words don’t quite capture the feeling in the air on the day before Christmas.
Content idea: Share a glimpse of your team’s holiday traditions or favorite childhood Christmas memories.
December 25. Christmas Day #Christmas #MerryChristmas
Celebrated by billions around the world to commemorate the birth of Jesus Christ, Christmas Day is one for joy, laughter, and merriment. While some prefer to spend the day cozying up indoors with their families and friends, others start their day in church, shopping, or at lunch.
Content idea: Post a festive message of gratitude to your community, reflecting on the moments that made the year special.
December 31. New Year’s Eve #NYE #NewYearsEve
The global countdown to welcome the New Year reaches its peak. We love a good party to count the seconds down.
Content idea: Invite your audience to share their “word of the year” or predictions for what’s to come in 2026.
December 31. No Interruptions Day #NoInterruptionsDay
Close out the year on a peaceful note by creating a quiet bubble of concentration. The recommendation is to disconnect from the world for a little while and focus solely on yourself – whether it's work that needs to be done or evaluating your goals as the new year approaches.
Content idea: Post a mindfulness or productivity ritual your team swears by to finish the year strong.
That’s a wrap
Finish the year on a high note with insights that make a difference to your creative strategy for social.
For more content to elevate your social media and marketing arsenal, check out our Social Media Holiday Calendar 2025.
