1. October 3, 1849 - California's First Constitution was written in Monterey, California. This Constitution was the first step towards California becoming a state just two years later.

2. October 3, 1863 - President Abraham Lincoln called for a day of Thanksgiving to be celebrated annually on the last Thursday of November. This proclamation helping cement Thanksgiving as a national holiday within the United States.

3. October 3, 1967 - A new California State Law allowed cities to raise the legal age of drinking to 21. This law was implemented in response to increasing public concern over alcohol abuse among youth.

4. October 3, 1995 - The famous trial of O.J. Simpson ended in a not-guilty verdict for the murder of his ex-wife Nicole Brown Simpson and her friend Ron Goldman. The trial was highly publicized and remains one of the most widely-watched legal cases in history.

5. October 3, 2018 - California Governor Jerry Brown signed a bill banning the sale of cosmetics that contain testing on animals. California became the first state to enact such a law, setting a precedent for animal welfare regulations in the cosmetics industry.