Schools in the U.S. in general start way too early. The AAP recommends no earlier than 8:30 AM [1]; the average across the U.S. is 8:00 AM [2], and close to 20% of suburban high schools start before 7:30 AM. An 8:30 AM start time would be after sunrise in every major municipality in the U.S; sunrise in Seattle and Duluth (the most northerly major cities in the continental U.S.) on Dec 21 is at 7:55 AM.
GP was proposing year-round standard time, not year-round DST.