The main purpose of this legislation is to establish Patriot Day as an official federal holiday in the United States. The objective is to recognize and honor the significance of this day, which is likely intended to commemorate events that have had a profound impact on the nation, such as the September 11 attacks. The key provision of this legislation is the amendment to the United States Code, specifically title 5, which lists federal holidays. The bill proposes to add "Patriot Day" to this list, placing it right after Labor Day.