That sounds good in theory, but it doesn't work in practice. The last time the Federal government mandated something related to time zones, it was when George

That sounds good in theory, but it doesn't work in practice. The last time the Federal government mandated something related to time zones, it was when George W Bush changed the days of DST, expanding it. It was a giant mess, and studies showed that instead of saving energy as was the claimed rationale, it instead ended up costing a lot of money and wasting more energy; a "fucking mess" as you put it. If we had a Federal government that actually knew WTF it was doing, your idea would make sense. You really think the Trump Administration could make sensible timezone policy decisions?