1. Pearl Harbor and New Mexico:
December 7, 1941 is widely known as the day of the infamous attack on Pearl Harbor, but it is lesser-known that New Mexico played a crucial role in the event. Just before the attack, a group of Japanese-American students from the University of California at Berkeley were visiting the Las Cruces high school. When news of the attack broke, they were interned in a horse stable at the New Mexico State University until the end of the war.

2. New Mexico's Statehood Day:
December 7 is also celebrated as New Mexico's Statehood Day. On this day in 1912, New Mexico was officially admitted as the 47th state in the Union.

3. The Arrival of Juan de Oñate:
In 1598, on December 7, Juan de Oñate and his party arrived in what is now San Juan Pueblo, New Mexico. This marked the beginning of Spanish exploration and colonization in the area, which would have a significant impact on the region's culture and history.

4. First Atomic Chain Reaction:
On December 7, 1942, a team of scientists led by Enrico Fermi successfully conducted the first atomic chain reaction at the University of Chicago. This event paved the way for the development of nuclear power, which would play a major role in New Mexico's history through the establishment of the Los Alamos National Laboratory and the Manhattan Project.

5. The Rosenberg Trial:
On December 7, 1950, Julius and Ethel Rosenberg were indicted for passing nuclear secrets to the Soviet Union. The case would become one of the most famous spy trials in U.S. history and would involve several figures from New Mexico, including Robert Oppenheimer, the director of the Los Alamos laboratory. Ultimately, the Rosenbergs were convicted and executed for their role in the espionage.