I wish they started in September like they used to, way back in the day. Our DD starts school on the 24th of August (We live in LA county). Yeah, mid-week to!
We are in LA County (but not part of LA School System) and our district goes back on the Thursday after Labor Day (Sept. 8th, this year). I think our district is one of the last to start back. Most everyone else that we know is already back at school before my kids start back.
We live in Central Ca and we go back Wed. I think it will really vary up adn down the state. There will be a lot more time out of school during the year due to the budget cuts.