Welcome to the final installment of our 2025 social media calendar series! Part four focuses on Q4 (October to December), a season brimming with holidays, awareness campaigns, and inspiring observances. From Breast Cancer Awareness Month (#BreastCancerAwareness) in October to the festive cheer of December’s #Christmas and #NewYearsEve2025, these months provide countless opportunities to craft engaging and impactful content. Whether you’re spotlighting World Mental Health Day (#WorldMentalHealthDay), Giving Tuesday (#GivingTuesday), or International Human Rights Day (#HumanRightsDay), this guide equips you with the tools to connect with your audience and end the year on a high note.
October 2025 social media hashtags and holidays
Themes for the month of October:
Weeks of observance in October:
Mental Illness Awareness Week: October 5 – 11
Sharad Navratri: October 3 – 12
Yom Kippur: October 1 - 2
October 2025 Hashtag calendar:
October 1 – International Day of Older Persons #UNDOP
October 1 – International Coffee Day #InternationalCoffeeDay
October 1 – World Vegetarian Day #WorldVegetarianDay
October 2 – Day of Nonviolence #InternationalDayOfNonviolence
October 3 – National Techies Day #TechiesDay
October 4 – World Animal Day #WorldAnimalDay
October 4 – National Taco Day #NationalTacoDay
October 5 – World Teachers Day #WorldTeachersDay
October 6 – World Habitat Day #WorldHabitatDay
October 9 – World Sight Day #WorldSightDay
October 10 – World Mental Health Day #WorldMentalHealthDay
October 11 – International Day of the Girl #DayOfTheGirl
October 13 – National Train Your Brain Day #TrainYourBrainDay
October 14 – National Dessert Day #DessertDay
October 15 – Global Handwashing Day #GlobalHandwashingDay
October 16 – National Boss’s Day #NationalBossDay #BossDay #BestBossEver #HappyBossDay
October 16 – World Food Day #FoodDay
October 17 – Eradication of Poverty Day #EndPoverty
October 20 – National Clean Your Virtual Desktop Day #CleanYourVirtualDesktopDay
October 21 – Reptile Awareness Day #ReptileAwarenessDay
October 24 – United Nations Day #UNDay
October 25 – Greasy Foods Day #GreasyFoodsDay
October 28 – National Chocolate Day #NationalChocolateDay
October 30 – National Candy Corn Day #CandyCornDay
October 30 – National Publicist Day #NationalPublicist
October 31 – Halloween #Halloween
November 2025 social media hashtags and holidays
Themes for the month of November:
Weeks of observance in November:
Children's Book Week: November 6-12
World Kindness Day: November 13
National Global Entrepreneurship Week: November 11-17
November 2025 Hashtag calendar:
November 1 – World Vegan Day #WorldVeganDay
November 1 – National Authors Day #NationalAuthorsDay
November 2 – Daylight Saving Time Ends #DaylightSavings
November 3 – National Sandwich Day #NationalSandwichDay
November 4 – National Candy Day #NationalCandyDay
November 5 – National Stress Awareness Day #StressAwarenessDay
November 8 – National Cappuccino Day #CappuccinoDay
November 8 – 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 – World Day of Remembrance for Road Traffic Victims #WDoR2025 #WDoR
November 17 – International Students Day #InternationalStudentsDay
November 18 – National Entrepreneurs Day #EntrepreneursDayNovember
November 19 – International Men’s Day #InternationalMensDay
November 19 – Women’s Entrepreneurship Day #WomensEntrepreneurshipDay
November 21 – World Hello Day #WorldHelloDay
November 26 – National Cake Day #NationalCakeDay
November 27 – Thanksgiving Day #Thanksgiving
November 28 – Black Friday #BlackFriday #BlackFriday2025
November 28 – National Native American Heritage Day #NAHertitage
November 28 – National Day of Listening #DayOfListening
November 29 – Small Business Saturday #SmallBusinessSaturday
November 30 – Computer Security Day #ComputerSecurityDay
December 2025 social media hashtags and holidays
Themes for the month of December:
Weeks of observance in December:
Human Rights Day: December 10
Hanukkah: December 14 – 22 December
Kwanzaa: December 26 – 1 January 2025
December 2025 Hashtag calendar:
December 1 – World AIDS Day #WolrdAIDSDay
December 1 – Cyber Monday #CyberMonday
December 2 – Giving Tuesday #GivingTuesday
December 3 – Persons with Disabilities Day #IDPWD
December 4 – National Cookie Day #NationalCookieDay
December 5 – World Soil Day #WorldSoilDay
December 8 – Pretend to Be a Time Traveler Day #PretendToBeATimeTravelerDay
December 10 – Human Rights Day #HumanRightsDay
December 10 – Nobel Prize Day #NobelPrize
December 11 – International Mountain Day #InternationalMountainDay
December 21 – Crossword Puzzle Day #CrosswordPuzzleDay
December 21 – First Day of Winter #WinterSolstice
December 25 – Christmas Day #Christmas
December 31 – No Interruptions Day #NoInterruptionsDay
December 31 – New Year’s Eve #NewYearsEve2025
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