> The federal government controls the nation’s time zones, as well as the start and end dates of daylight saving time. States can choose to exempt themselves from daylight saving time — Arizona and Hawaii do — but nothing in federal law allows them to exempt themselves from standard time.
i guess you can always count on the times to advocate for centralized power
Here's an example. Suppose I'm driving down the highways, and I arrive at some town and I decide to stop for lunch. I see a parking space, but it says I can't park there at certain times. But every city in the country sets its own clocks. How do I figure out what time it is? That's a pain, right?
And standard time was not instituted by the government, using the powers of the Commerce Clause. It was instituted by railroads, who found the exact issue you described to be a pain when trying to schedule trains.
> [The Congress shall have power] To coin Money, regulate the Value thereof, and of foreign Coin, and fix the Standard of Weights and Measures;