1. The Colorado Territory was established on March 3, 1863. The territory encompassed present-day Colorado, Wyoming, and parts of Montana and Nebraska until Colorado became a state in 1876.
2. On March 3, 1936, the Hoover Dam was completed, which helped to provide electricity and water to the southwestern United States, including parts of Colorado.
3. On March 3, 1985, the Stapleton International Airport in Denver set a record for the most number of passengers traveling on a single day. Over 200,000 passengers passed through the airport.
4. In 2014, the Colorado Northwestern Community College Foundation announced the creation of a scholarship fund for women pursuing careers in aviation in honor of Women of Aviation Week, which occurs annually on March 3.
5. On March 3, 1998, the Colorado Avalanche defeated the Detroit Red Wings 2-1 in a game that ended with a brawl between the two teams, which is now known as the "Brawl in Hockeytown."