Online rumors oversimplify the law, but they do highlight a very real gap between legal minimums and best safety practices. While California Vehicle Code 27360 allows an eight-year-old to graduate from a booster seat on their birthday, biological development rarely syncs up with legislative calendars.
Drivers must prioritize bone development and physical belt fit over social pressures or calendar milestones. Until an older child reaches 4 feet 9 inches and passes every step of the 5-Step Test, using a well-fitted booster seat remains the safest and most reliable way to ride California's roadways.
