The central term, "Patriot Day," is a proper noun. This American observance is also officially designated as the National Day of Service and Remembrance. Both names refer to the same annual commemoration held on September 11th.
The dual titling reflects the observance's legislative evolution. Initially, a 2001 proclamation by President George W. Bush designated September 11th as Patriot Day to honor the individuals who lost their lives in the 2001 terrorist attacks. Subsequently, the Edward M. Kennedy Serve America Act, signed into law in 2009, formally designated the day as the National Day of Service and Remembrance. This addition was intended to provide a positive and forward-looking way for citizens to pay tribute through volunteerism and charitable acts. It is critical to distinguish this observance from Patriots' Day (with an apostrophe 's'), a regional holiday in New England commemorating early Revolutionary War battles.
The two names encapsulate the twofold purpose of the day. "Patriot Day" emphasizes solemn remembrance, mourning, and the honoring of victims and first responders. In contrast, "National Day of Service and Remembrance" encourages an active, constructive response to tragedy, channeling grief into positive community action. This dual identity serves to both commemorate a national tragedy and to foster unity and resilience through civic engagement.