If the California bill is signed, it would become the first place to adopt a late start statewide, reports The New York Times.

“Starting school before the human brain is awake is problematic,” said Kyla L. Wahlstrom, a senior research fellow at the University of Minnesota’s College of Education and Human Development who has studied the topic for years. Students need a little more than nine hours of sleep each night, she said, adding that research has conclusively shown that teenagers who get less than eight hours of sleep are more likely to be depressed, use illegal substances and get into car crashes.