September 3: Hive Orlando meeting at East End Market (Orlando, FL)
September 4: National Wildlife Day (U.S.)
September 7: International Manatee Day (Global)
September 12: International Donate Day (Global)
September 12: IDEAS presents Disruption Movie Screening (Orlando, FL)
September 15-21: National Drive Electric Week (U.S.)
September 16: International Day for the Preservation of the Ozone Layer (Global)
September 20: Youth Convergence at the People’s Climate March (New York, NY)
September 20: 2014 International Coastal Cleanup (Global)
September 21: People’s Climate March (New York, NY)
September 26: World Environmental Health Day (Global)
September 27: The Green Apple Day of Service (U.S.)

For more information on these days or additional dates, refer to the Event page here: