Each spring, every state but two "springs forward" from the dark winter into the brighter days of daylight saving time.

The switch has been in place since World War I, when European countries figured out they could save oil and energy by delaying the sunset. So, if daylight saving time is so beneficial, why doesn't everywhere have it year round?

For years, UW Law Professor Steve Calandrillo has been begging this very question. In three minutes, he shares insights into the practice's history and discusses the potentially major benefits a permanent switch could bring.