The keyword phrase "Patriot Day of Service" functions grammatically as a compound proper noun. It is the specific name of an official U.S. observance designed to encourage volunteerism and charitable acts on September 11th as a tribute to the victims and heroes of the 2001 terrorist attacks.
This designation was formally established through the Edward M. Kennedy Serve America Act, signed into law in 2009. The legislation officially recognized September 11th as a National Day of Service and Remembrance. The core purpose is to provide a positive and forward-looking way to honor the memory of the lives lost by transforming a day of tragedy into a day of unity and constructive action. It channels the spirit of service that emerged across the nation following the attacks into a sustained, annual tradition of civic engagement.
In practice, this concept reinterprets the commemoration of September 11th from a day of solemn reflection alone to one of active participation. It encourages individuals and communities to engage in tangible projects such as food drives, neighborhood clean-ups, disaster preparedness training, or support for first responders and military families. Consequently, the term frames patriotism not merely as remembrance, but as an active commitment to strengthening the nation through service to one's community.