1. On March 21, 1865, the Nevada State Legislature authorized the construction of a new state capitol building in Carson City. The building was completed in 1871 and still stands today as one of the state's most historic landmarks.

2. The first known automobile race in Nevada took place on March 21, 1903, in the city of Reno. The race featured a handful of rudimentary cars, with the winner finishing the course in just over 25 minutes.

3. On March 21, 1931, the Nevada State Highway Department completed construction of the Hoover Dam Bypass Road, which allowed motorists to bypass the narrow and dangerous Original Route of the dam. The bypass road is still in use today and has been designated a National Scenic Byway.

4. Legendary singer Frank Sinatra made his Las Vegas debut on March 21, 1951, at the Desert Inn hotel and casino. His performance was a huge success and cemented Sinatra's status as one of the top entertainers in the city's history.

5. On March 21, 1983, the Las Vegas-based boxing match between Marvin Hagler and Roberto Duran was broadcast to over 50 countries around the world. The bout was a historic moment in the sport's history and helped establish Las Vegas as a premier destination for championship fights.