1. California became the 31st state to be admitted to the Union on December 10, 1849, following the California Gold Rush.

2. On December 10, 1948, the United Nations General Assembly adopted the Universal Declaration of Human Rights in Paris, which was drafted by a committee led by California's own Eleanor Roosevelt.

3. In 1964, the first indoor BART (Bay Area Rapid Transit) train service began on December 10, with a line from MacArthur to Fremont.

4. On this day in 2004, the first same-sex marriage licenses were issued in the United States in San Francisco City Hall, after Mayor Gavin Newsom instructed the city clerk to do so.

5. The Hollywood Walk of Fame was established on December 10, 1953, with the first eight stars being unveiled on the same day, including those of celebrities like Joanne Woodward, Olive Borden, and Ronald Reagan.