The term "patriot day us" functions as a proper noun phrase. The core component, "Patriot Day," is a proper noun, which is the specific name of a day of observance. The subsequent element, "us," acts as a postpositive adjective or a country specifier, modifying "Patriot Day" to designate the observance specific to the United States. This grammatical structure serves to precisely identify a particular national event.
Patriot Day in the United States is the official name for the annual observance on September 11. It was established by presidential proclamation in 2001 and signed into law in 2002 as a national day to remember and honor the 2,977 people killed in the terrorist attacks of September 11, 2001. By law, the U.S. flag is flown at half-staff on all government buildings, and a moment of silence is requested at 8:46 a.m. (Eastern Daylight Time), the time of the first impact. This observance should not be confused with Patriots' Day, a state holiday in Massachusetts, Maine, and Wisconsin, which is celebrated in April to commemorate the Battles of Lexington and Concord.
The grammatical function as a proper noun phrase is crucial for distinguishing this specific day of solemn remembrance from a generic "patriotic day." The addition of the "us" specifier is particularly common in search engine queries and databases to disambiguate the American observance from similarly named holidays in other nations or from the distinct regional U.S. holiday of Patriots' Day. Therefore, the construction of the term directly reflects its primary purpose: unambiguous identification of the National Day of Service and Remembrance for the events of 9/11.
