1. On November 20, 1849, California officially became a state after being admitted into the United States. The gold rush had started the year prior, leading to a rapid increase in population and economic growth.

2. In 1952, the first freeway in California was opened to the public. The Arroyo Seco Parkway connected Los Angeles and Pasadena and is now known as the Pasadena Freeway.

3. On November 20, 1975, Governor Jerry Brown appointed Willie L. Brown Jr. to the California State Assembly. Brown would go on to become one of California's longest-serving Speakers of the House.

4. In 1985, the first version of Microsoft Windows was released. While not specific to California, the tech industry has played a significant role in the state's economy and development.

5. November 20, 1989, marked the inauguration of Governor Pete Wilson. During his time in office, Wilson implemented policies focused on fiscal responsibility and public safety, including controversial measures such as Proposition 187, which aimed to restrict access to social services for undocumented immigrants.