1. The construction of Hoover Dam's power plant was completed on December 27, 1935. The dam, located on the border of Nevada and Arizona, was a massive project that employed thousands of workers and helped to provide hydroelectric power to the Southwest US.

2. On December 27, 1910, a massive explosion occurred at the Tonopah-Belmont Mine in Tonopah, Nevada. The blast killed six men and injured several others. The incident led to improvements in mine safety laws and regulations.

3. The famous American author and journalist Mark Twain spent some time in Nevada in the late 1800s. On December 27, 1863, he wrote a letter from Carson City, Nevada to his sister. In the letter, he described the state's arid landscape and rugged beauty.

4. The Las Vegas Convention Center officially opened on December 27, 1959. The center has since become one of the top venues for trade shows, conventions, and other large events in the US.

5. The University of Nevada, Reno was founded on October 12, 1874, but it was not until December 27 of the same year that the first classes were held. The university has since become one of the top institutions of higher learning in the state and is known for its strong programs in fields such as engineering, business, and the sciences.