The 2022-23 Budget: State Preschool

Feb 22, 2022 - At full implementation in 2025 ‑26, a child who has their fourth birthday by September 1 will be eligible for TK, making the grade available to all four ‑year olds. Schools Must Provide Services for Students With Disabilities Beginning at Age Three.
https://lao.ca.gov/Publications/Report/4555