1. The first statewide primary election in California was held on June 6, 1911. This election was significant because it marked a shift in the political landscape of California, as the state's Progressive Movement began to gain momentum.

2. On June 6, 1944, the Allied invasion of Normandy, known as D-Day, was underway. California played a significant role in supporting the war effort, with Los Angeles serving as a crucial hub for military production and San Francisco serving as a major port of embarkation for troops headed to the Pacific theater.

3. One of the worst disasters in California history occurred on June 6, 1971, when the Sylmar earthquake shook the San Fernando Valley region. The earthquake registered a magnitude of 6.6 and resulted in 64 deaths and over 2,500 injuries.

4. June 6, 2002 saw the opening of the Walt Disney Concert Hall in downtown Los Angeles. Designed by architect Frank Gehry, the concert hall is renowned for its distinctive steel curves and acoustically superior concert hall.

5. On June 6, 2011, the California State Assembly passed a bill to ban the use of handheld cell phones while driving. California was the first state to pass such a law, and this legislation served as a model for similar laws across the country. The law went into effect on January 1, 2017, and has contributed to a decrease in distracted driving-related accidents.