Patriot Day is a United States national observance occurring annually on September 11 to commemorate the 2,977 people killed in the September 11, 2001 terrorist attacks. Established by a presidential proclamation and later codified into law, the day is designated for remembrance of the victims, their families, and the first responders who sacrificed their lives. It is a day of solemn reflection rather than a federal holiday where non-essential government offices and businesses are closed.
The observance is officially mandated by U.S. Public Law 107-89, which designates "September 11 of each year as Patriot Day." By law, the President directs that the flag of the United States be flown at half-staff at all U.S. government buildings and establishments, both at home and abroad. Americans are also encouraged to display the flag at half-staff from their homes. A nationwide moment of silence is often observed at 8:46 a.m. Eastern Daylight Time, the moment the first plane struck the North Tower of the World Trade Center. It is crucial to distinguish Patriot Day (September 11) from Patriots' Day, a state holiday in Massachusetts, Maine, and Wisconsin on the third Monday of April, which commemorates the first battles of the American Revolutionary War.
In practice, Patriot Day serves as a day for national unity, remembrance, and service. Many communities hold memorial services, candlelight vigils, and other events to honor the victims. The observance was also expanded by the Edward M. Kennedy Serve America Act, which designated September 11 as a National Day of Service and Remembrance. This legislation encourages Americans to engage in charitable service and volunteer activities as a tribute to the victims and a reaffirmation of the national response of unity and compassion that followed the attacks.