September is a great time to reset and refocus—and your content calendar is no exception. From awareness campaigns to lighthearted observances, this month’s roundup is full of opportunities to inform, inspire, and connect with your community.

Whether you're getting ahead on planning or need a quick spark of creativity, this list has you covered.

Get content ideas for the rest of 2025! Download our free 2025 Observance Calendar and stay ahead in your content planning all year long.

Please keep in mind that this is not meant to be a full list of observances and we encourage you to check with your state/county for any area-specific days or with your peers in our GSM Facebook Community Group or free GSM Network. Other helpful resources for additional observances include List of National Days, National Today, Ready.Gov’s Preparedness Calendar, NWS Awareness and Preparedness Calendar, or the United Nations List of International Days and Weeks.

Observed in the month of September

• Animal Pain Awareness Month
• Baby Safety Month
• Bear Necessities Month
• Hunger Action Month
• National Childhood Cancer Awareness Month
• National Food Safety Education Month
• National Hispanic Heritage Month (Sep 15-Oct 15)
• National Infant Mortality Awareness Month
• National Library Card Sign-Up Month
• National Preparedness Month
• National Recovery Month
• National Service Dog Month
• National Sickle Cell Awareness Month
• National Wilderness Month
• Pet Sitter Education Month
• Responsible Dog Ownership Month
• Self-Care Awareness Month
• Suicide Prevention Awareness Month
• World Alzheimer’s Month

Weeks observed in September

• 1-7: National Childhood Injury Prevention Week
• 8-13: National Suicide Prevention Week
• 14-20: National Arts in Education Week
• 14-20: National Forensic Science Week
• 14-20: National Truck Driver Appreciation Week
• 15-21: Pollution Prevention Week
• 21-27: National Construction Appreciation Week
• 21-27: National Farm Safety and Health Week
• 21-27: National Security Officer Appreciation Week
• 21-27: Child Passenger Safety Week
• 21-27: Deaf Dog Awareness Week
• 21-27: Sea Otter Awareness Week
• 22-28: International Week of the Deaf

Days observed in September

• 1: Labor Day
• 1: National Child Identity Theft Awareness Day
• 1: World Letter Writing Day
• 2: V-J Day
• 3: U.S. Bowling League Day
• 4: National Wildlife Day
• 5: International Day of Charity
• 5: National Food Bank Day
• 6: National Hummingbird Day
• 6: National Read a Book Day
• 7: Grandparents Day
• 7: International Day of Clean Air for Blue Skies
• 7: International Day of Police Cooperation
• 8: International Literacy Day
• 8: National Dog Walker Appreciation Day
• 9: International Day to Protect Education from Attack
• 10: World Suicide Prevention Day
• 11: National Day of Service and Remembrance
• 11: Patriot Day
• 12: National Police Woman Day
• 13: Farmers’ Consumer Awareness Day
• 15: International Day of Democracy
• 15: World Afro Day
• 16: International Day for Interventional Cardiology
• 16: International Day for the Preservation of the Ozone Layer
• 16: Mexican Independence Day
• 16: National Day of Prayer and Remembrance for the Victims of Hurricane Katrina
• 16: National IT Professionals Day
• 16: National Voter Registration Day
• 17: Constitution Day and Citizenship Day
• 17: National Pet Carbon Monoxide Safety Day
• 17: World Patient Safety Day
• 18: Air Force Birthday
• 18: International Equal Pay Day
• 18: National HIV/AIDS and Aging Awareness Day
• 18: World School Backpack Awareness Day
• 18: World Water Monitoring Day
• 19: National POW/MIA Recognition Day
• 19: Talk Like a Pirate Day
• 20: International Coastal Cleanup Day
• 20: National Cleanup Day
• 20: National Crime & Intelligence Analyst Appreciation Day
• 20: Responsible Dog Ownership Day
• 20: Thank a Police Officer Day
• 20: World Cleanup Day
• 21: International Day of Peace
• 21: National Opioid Awareness Day
• 21: World Alzheimer’s Day
• 21: World Gratitude Day
• 22: American Business Women’s Day
• 22: Autumn Equinox
• 22-24: Rosh Hashanah
• 22: World Car-Free Day
• 23: Dogs in Politics Day
• 23: International Day of Sign Languages
• 24: National Women’s Health and Fitness Day
• 26: European Day of Languages
• 26: HR Professionals Day
• 26: International Day for the Total Elimination of Nuclear Weapons
• 26: National Day of Praise and Worship
• 26: National Law Enforcement Suicide Awareness Day
• 26: World Maritime Day
• 27: National Hunting and Fishing Day
• 27: National Public Lands Day
• 27: National Seat Check Saturday
• 27: World Tourism Day
• 28: Gold Star Mother’s Day
• 28: International Day for Universal Access to Information
• 28: National Good Neighbor Day
• 28: World Rivers Day
• 29: International Day of Awareness of Food Loss and Waste
• 29: National Coffee Day
• 29: Urban National Wildlife Refuge Day
• 29: World Heart Day
• 30: International Podcast Day
• 30: International Translation Day