Yes, today is the day that we all “spring forward”. The theory at least is that we are lowering our use of energy. Indeed, they do call it “Daylight Savings Time”, and it isn’t daylight we are saving, it is (supposedly) energy. With the high cost of energy, that could be a good thing.
Except that there is almost no evidence that DST saves any energy at all, and even some studies that show that it wastes energy.
Even if once upon a time DST saved energy — by not requiring people to use home lighting until one hour later in the summer — the advent of air conditioning more than cancelled out that savings. After all, air conditioning uses far more energy than lighting.
DST can also be bad for us. One study showed that on the Monday immediately after DST starts, heart attacks increase by 25%. In addition, traffic accidents increase, probably because of losing an hour of sleep.
So why do we keep doing it? I’m a pragmatist. Even if DST once helped save energy, it is an idea whose time has come and gone. As an article in The Atlantic puts it, DST is now wasteful, unnecessary, and even dangerous.
But for now, please be careful out there Monday morning.