California is the only U.S. state to have hosted both the Summer and Winter Olympics. In 2010, California residents were ranked first among the states with the best average credit score of 754. California’s interconnected water system is the world’s largest, managing over 40,000,000 acre feet (49 km3) of water per year. The world’s largest outdoor amphitheater is located in California. After the gold rush, California was nicknamed the “Golden State.” Countryaah.com: Offers a full list of nationwide and statewide holidays in California starting from January 1st – New Year’s Day. Also covers the most recent three years of public holidays within the state of California.