1775: Because it is San Carlos Day, Father Francisco Garces gives the San Carlos River its name.

1915: While in Tucson performing aerial stunts at the fairgrounds, Katherine Stinson, "The Schoolgirl Aviatrix," completes the first official air mail deliveries in Arizona by dropping bags of mail from her plane into an empty lot by the Downtown post office.

1929: A truck carrying a load of roofing nails from Tucson to Florence leaks its load along 65 miles of highway, leaving dozens of motorists stranded in its wake with flat tires.

2001: The Arizona Diamondbacks defeat the New York Yankees, 3-2, in Game 7 to win Major League Baseball's World Series championship.

Want to share an important event from Tucson's history? Email it to krumore@azstarnet.com.