For California anglers, September 6 will be a Free Fishing Day. The Department of Fish and Game offers two Free Fishing Days each year. On these days, anglers can fish without having to buy a sport fishing license.
California Free Fishing Days provide a great, low-cost way to give fishing a try. All fishing regulations, such as bag and size limits, gear restrictions, report card requirements, fishing hours and stream closures remain in effect.
For more information, please visit: www.dfg.ca.gov/licensing/fishing/freefishdays.html
source: CA DFG