The Complete December 2021 Social Media Holiday Calendar.

Here are the most important (and strangest) holidays, events, and hashtags for social media managers and digital marketers to know in December 2021.
Roza Tsvetkova
November 19, 2021 - 6 min. read

December is such an interesting month for our social media calendars! From Games Day to Nobel Prize Day and Christmas — it will be a great month for social media managers and their communities.

December 1: World AIDS Day #WorldAIDSDay

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 10: International Human Rights Day #HumanRightsDay

December 10: International Animal Rights Day #AnimalRightsDay

December 10: Nobel Prize Day #NobelPrize

December 10: Hanukkah Begins #Hanukkah #Chanukah

December 11: International Mountain Day #InternationalMountainDay

December 20: Games Day #GamesDay

December 21: National Crossword Puzzle Day #CrosswordPuzzleDay

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 (Last work day of the year) #NoInterruptionsDay

December 1

World AIDS Day #WorldAIDSDay

Let’s take a moment to remember all victims of AIDS and raise awareness about the disease’s prevention.

December 3

International Day of Persons with Disabilities #IDPWD

Take a moment to appreciate and celebrate people with disabilities. Here is how Nokia did it on social media.

December 4

National Cookie Day #NationalCookieDay

What a sweet day! Take a moment to celebrate cookies with your community on social media.

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Starbucks Canada (@starbuckscanada)

December 5

World Soil Day #WorldSoilDay

On this day, we recognize the power and importance of the soil and preach for a sustainable lifestyle so soil can be nurtured. Here is how Bayer marked the day with a special expert interview.

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Bayer (@bayerofficial)

December 5

International Ninja Day #InternationalNinjaDay

The rumour says that December 5 became the International Ninja Day because of the Tom Cruise movie “The Last Samurai,” where one could watch a ninja-vs-samurai battle, and because the movie was released on that day.

Find an interesting way to engage around it with your community on social media.

December 10

International Human Rights Day #HumanRightsDay

Show the human side of your brand and celebrate the International Human Rights Day with your community on social media. The holiday promotes the values from the Universal Declaration of Human Rights, which was adopted by the UN General Assembly in 1948.

Here are two examples from different industries from last year:

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Nokia (@nokia)

December 10

International Animal Rights Day #AnimalRightsDay

On this holiday, brands advocate for ethical and fair treatment of animals across the world. It started back in 1998 and is a good occasion to relate your brand to its cause.

December 10

Nobel Prize Day #NobelPrizeDay

Every year on December 10th, the world celebrates the Nobel Prize awards. Join the festivities on social media and relate to the inventions in Literature, Physics, Chemistry, Medicine, and Peace.

December 10

Hanukkah Begins #Hanukkah #Chanukah

This day marks the beginning of the Jewish Festival of Lights, which continues for eight nights. Join the conversations on social media and celebrate with your community.

Here are two examples of what various brands did for the occasion:

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by The Metropolitan Museum of Art (@metmuseum)

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by OPI (@opi)

December 11

International Mountain Day #InternationalMountainDay

December 11 is a great day to celebrate with all mountain lovers on social media and offer special deals for them if relevant.

This is how brands like Mini and Redbull engaged their communities.

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by MINI (@mini)

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Red Bull (@redbull)

December 20

Games Day #GamesDay

This is one of the most playful days of the year so why not let your brand join the game on social media? It started back in 1975 with a games convention in Birmingham, UK, but no matter where in the world you are, here are some ideas how your brand can join the conversations on social media:

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by SUBWAY India (@subway_india)

December 21

National Crossword Puzzle Day #CrosswordPuzzleDay

Speaking of games, on December 21 your brand can celebrate the birth of the crossword puzzle in 1913 in New York World. Get creative and create some engagement around it on social media. Check out some ideas from other brands:

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Mercedes-Benz Benchmark Cars (@benchmarkcars)

December 21

First Day of Winter #WinterSolstice

In some parts of the world, this is the astronomical first day of winter and brands love to celebrate it with some special offers and social media greetings. Let’s look at two of those:

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Cartier Official (@cartier)

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by MoMA The Museum of Modern Art (@themuseumofmodernart)

December 23

Festivus #Festivus #AiringOfGrievances

Festivus is a fun non-commercial holiday and a playful form of consumer resistance during the Christmas holidays and all the shopping typical for those. It became popular thanks to a 1997 episode of Seinfeld and ever since brands embrace it in a creative way on social media.

December 24

Christmas Eve #ChristmasEve #MerryChristmas

It’s that magical time of the year when no matter where in the world, eCommerce and shopping are booming. Don’t miss the chance to create a special offer for your audience on social media or just send them a warm greeting. Check out these two examples for inspiration:

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Empire State Building (@empirestatebldg)

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by The Body Shop Official (@thebodyshop)

December 25

Christmas Day #Christmas #MerryChristmas

Christmas is a time of joyful spirit and exchange of gifts. Celebrate it from your community on social media, and if you are looking for ideas on how to tap into the holiday, here are some ideas:

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Land Rover (@landrover)

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by GoPro (@gopro)

December 31

New Year’s Eve #NYE #NewYearsEve

The end of the year is knocking on our doors so how will your brand celebrate on social media? Let’s look at what some brands did in 2020.

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Land Rover (@landrover)

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by GUESS (@guess)

December 31

No Interruptions Day (Last work day of the year) #NoInterruptionsDay

This is a day to celebrate everyone who is working hard between Christmas and New Year’s Eve. Give them a shout-out on social media!

 
 
 
 
 
View this post on Instagram
 
 
 
 
 
 
 
 
 
 
 

A post shared by Caffè di Artisan (@caffediartisan_luxury_coffee)

Final thoughts.

It’s time to wrap up for December. If you are looking for the complete monthly social media calendar, click on the download button below and save the image that pops up.

Have a great December!

December Social Media Holiday Calendar.
Here are some of the key and fun dates to help you plan your content calendar.
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