[AnimalMuppet]

That's quite a stretch. (Of course, the Commerce Clause has been stretched far beyond sanity before...)

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.

[DerekL]

Yes, the Commerce Clause is not the best basis for this. Clause 5 is much better:

> [The Congress shall have power] To coin Money, regulate the Value thereof, and of foreign Coin, and fix the Standard of Weights and Measures;