September Social Media Holidays 2025

Looking for holidays in September 2025? Here's a complete guide to the major, monthly, and random September holidays you can use to plan your social media calendar.

Major September Holidays (2025)

• Labor Day: Monday, September 1, 2025. This major national holiday in September honors the American labor movement and the contributions workers have made to the country's strength and prosperity.
• Patriot Day: Thursday, September 11, 2025. A national day of remembrance, Patriot Day honors the victims of the September 11, 2001, terrorist attacks.
• Rosh Hashanah: Monday, September 22 – Wednesday, September 24, 2025. This is the Jewish New Year, a significant two-day celebration that marks the beginning of the High Holy Days.
• First Day of Autumn: Monday, September 22, 2025. Also known as the autumnal equinox, this marks the official start of the fall season in the Northern Hemisphere.

September Monthly Observances (2025)

These month-long observances are a great way to create a consistent content calendar and engage your audience with a deeper dive into specific topics.

• National Suicide Prevention Month
• National Childhood Cancer Awareness Month
• Hispanic Heritage Month (starts September 15th and runs until October 15th)
• National Guide Dog Month
• National Recovery Month
• National Chicken Month
• National Self-Care Awareness Month

Random Holidays in September (2025)

These fun and unique September social media holidays are perfect for breaking up your content and adding a touch of personality to your feed.

• September 1: World Letter Writing Day, National Chicken Boy Day
• September 2: World Coconut Day
• September 3: National Skyscraper Day
• September 4: National Wildlife Day
• September 5: National Cheese Pizza Day
• September 6: National Read a Book Day
• September 7: National Grandparents Day
• September 8: International Literacy Day, National Ampersand Day, Star Trek Day
• September 9: International Sudoku Day
• September 10: World Suicide Prevention Day
• September 12: National Day of Encouragement, National Video Games Day
• September 13: Positive Thinking Day, National Peanut Day
• September 14: National Cream-Filled Donut Day
• September 16: National Guacamole Day
• September 17: Constitution Day and Citizenship Day
• September 18: National Cheeseburger Day
• September 19: National POW/MIA Recognition Day, Talk Like a Pirate Day
• September 20: International Coastal Cleanup Day, Batman Day
• September 21: International Day of Peace, World Gratitude Day
• September 23: National Dogs in Politics Day, International Day of Sign Languages
• September 26: National Johnny Appleseed Day, National Dumpling Day
• September 27: World Tourism Day, National Gold Star Mother's and Family's Day
• September 28: National Drink Beer Day
• September 29: National Coffee Day, World Heart Day
• September 30: International Podcast Day

Planning your social media content around these September holidays can be a great way to stay relevant and engaging.

For help creating captions for these and other holidays, you might want to try our AI caption generator. For a comprehensive list of August social media holidays and observances, visit National Today.

Be sure to check your audience and brand voice to see which of these holidays fit your social media strategy best.

Looking for more content inspiration? Check out our article on Using AI in Content Creation to streamline your social media strategy!