Its that time of year again, when Congress decrees that you shift your clock back an hour to save miniscule amounts of energy. The fine folks of Arizona and Indiana have noticed that Congress doesn’t really have the power to regulate time, and don’t like playing along.
But if you think about it, time is an essential part of measurement. The official definition of a meter is “length of the path traveled by light in vacuum during a time interval of 1/299,792,458 of a second.” Congress actually does have the power (Article 1, section 8) to establish standards of weights and measures. So, given that time is an essential part of how things are measured, and that measurements need to be in alignment with other parts of the solar system, it is actually proper for Congress to muck with the clocks occasionally. They should remember that the computer systems that track time may not be as clever as they would like to be, and be careful.
Anyway, I hope you all enjoyed an extra hour of sleep, and dreamt of a world in which Congress stopped to ask if time is a proper subject of regulation.