September 11 National Day of Service

The September 11 National Day of Service and Remembrance or 9/11 Day is a federally-recognized National Day of Service that happens in the United States on the anniversary of the September 11, 2001 terrorist attacks. Originally founded by the 9/11 nonprofit 9/11 Day, the September 11 National Day of Service and Remembrance later became federally recognized and authorized as a Day of Service under passage of the Edward M. Kennedy Serve America Act, which was adopted on a bipartisan basis by the U.S. Congress in 2009.

Source: Wikipedia — September 11 National Day of Service (CC BY-SA 4.0)