1. California officially became a state on May 10, 1850, when President Zachary Taylor signed the California Statehood Bill. This made California the 31st state to join the United States of America.

2. On May 10, 1933, the world-renowned Golden Gate Bridge in San Francisco was opened to the public. The bridge, which spans the Golden Gate Strait and connects San Francisco with Marin County, took four years to build and cost $35 million.

3. Famous California governor and actor Arnold Schwarzenegger was born on May 10, 1947, in Austria. Schwarzenegger went on to become a bodybuilder, actor, and politician, serving as the governor of California from 2003 to 2011.

4. May 10, 1970, marked the start of the California Jam festival, a massive rock concert held at the Ontario Motor Speedway in Southern California. The event featured legendary bands like Deep Purple, Black Sabbath, and The Doors, and attracted more than 350,000 attendees.

5. On May 10, 1994, a magnitude 6.1 earthquake struck Los Angeles, causing widespread damage and injuring more than 200 people. The earthquake, which was centered in the Northridge area of the city, caused more than $20 billion in damage and remains one of the costliest natural disasters in U.S. history.