1. California's entry into the Union: On November 11, 1850, California was admitted into the United States as the 31st state. This was a significant milestone in California's history as it marked the end of the California Gold Rush and began a new era of statehood in the West.

2. The end of World War I: November 11, 1918, marked the end of World War I and is celebrated in the United States as Veterans Day. This day is particularly significant to California as it is home to numerous military bases and has a rich tradition of honoring and supporting its veterans.

3. A major earthquake: On November 11, 1927, a 7.6 magnitude earthquake struck near the town of Lompoc, California. This earthquake caused significant damage to buildings and infrastructure in the surrounding area and is remembered as one of the most significant seismic events in California's history.

4. A revolutionary murder verdict: On November 11, 1969, Black Panther Party leader Huey Newton was acquitted of the murder of Oakland police officer John Frey. This verdict was seen as a significant victory for the Civil Rights movement and marked a turning point in the struggle for racial justice in California and the United States.

5. The defeat of Proposition 8: November 11, 2008, marks the day that California voters rejected Proposition 8, a ballot initiative that sought to ban same-sex marriage in the state. This decision was seen as a major victory for the LGBTQ+ rights movement and cemented California's status as a leader in progressive social policy.