California School Calendar 2026-2027

California operates the largest public school system in the United States, enrolling approximately 6 million students across more than 1,000 school districts. The state requires a minimum of 180 instructional days, though individual districts have considerable flexibility in setting their own academic calendars. As a result, start dates vary widely — some districts begin as early as late July, while others, particularly those following a traditional schedule, start after Labor Day in September. California uniquely observes Cesar Chavez Day on March 31 as a state holiday, honoring the civil rights and labor leader, which may result in a school closure depending on the district. The state's diverse geography and demographics mean that school calendars can differ significantly between urban districts like Los Angeles Unified and San Francisco Unified, suburban districts, and rural communities. California also has a notable number of year-round schools, particularly in high-enrollment areas, which operate on multi-track schedules that differ entirely from the traditional calendar. Families relocating within the state or enrolling children mid-year should confirm calendar details directly with their local district or the California Department of Education.