National Wear Red Day is observed in the United States on the first Friday of February and raises awareness about the dangers and prevention of heart disease. On this day, people are encouraged to wear red clothing to show their support for those who suffer from heart disease. Heart disease is the leading cause of death in America, so on National Wear Red Day, and during the month of February, the American Heart Association and other health organizations focus on spreading information about the prevention, treatment, and causes of the disease, to hopefully eradicate it in the future.

National Wear Red Day is not a public holiday, businesses and schools remain open.