1. The 1862 Great Fire of San Francisco: On June 28, 1862, a massive fire broke out in San Francisco, destroying much of the city. The fire began in a bakery and quickly spread due to strong winds and the large amounts of wood and hay that were stored in nearby buildings. The fire burned for over a day, causing millions of dollars in damage and leaving thousands of people homeless.

2. The Birth of Richard Rodgers: Richard Rodgers, one of the most popular composers in the history of musical theater, was born on June 28, 1902, in New York City. However, Rodgers spent many of his later years living in California and working on shows that debuted in Hollywood and on Broadway.

3. Yosemite National Park Established: On June 28, 1906, President Theodore Roosevelt signed a bill that officially established Yosemite National Park in California. The park, which is located in the Sierra Nevada mountain range, is known for its stunning waterfalls and granite cliffs, and attracts millions of visitors each year.

4. The Assassination of Harvey Milk: On June 28, 1978, Harvey Milk, California's first openly gay elected official, was assassinated along with San Francisco Mayor George Moscone. Milk, who was an advocate for gay rights and a prominent figure in the LGBT community, was shot by fellow supervisor Dan White.

5. The California Gold Rush Begins: On June 28, 1846, a group of American settlers proclaimed the independence of California from Mexico. This event marked the beginning of the California Gold Rush, which brought thousands of people to the state in search of riches. The Gold Rush had a massive impact on California's economy and culture, and it played a significant role in the state's development as a major economic and political power.