9/11 is more often referred to as "Patriot Day" -- "Patriot's Day" being the anniversary of the Battle of Lexington and Concord, April 19 (observed on the third Monday in April since 1969). Patriot Day was officially recognized by Public Law 107-89 (the 89th Act of the 107th Congress), signed into law by President Bush on December 18, 2001. President Bush used the authority granted therein to proclaim September 11, 2002, the first Patriot Day on September 4, 2002, and has issued similar proclamations each subsequent year. Other countries, such as Canada, have had sympathy observations of the day. It should be noted that Patriot Day is not a national holiday, but a day of remembrance.