Every fall more than 70 countries around the world turn their clocks back an hour ahead for daylight-saving time. If billions of people are literally shifting time twice a year, there must be a pretty good reason why we’re doing it, right? Not necessarily.
Studies have found that adjusting our clocks doesn’t really save us anything on energy use. What we save on lighting is negated by increasing the use of heat and air conditioning. When it’s light out longer we also tend to drive more, which means using more gas. Daylight-saving extensions haven’t been driven by energy costs they’ve been driven by retailers who want to give consumers more daylight to shop, eat out, and play golf.
The entire continental US has a reasonable sunset time for a majority of the year, but many places only see reasonable sunrise times for less than half of the year. If we were to abolish daylight-saving time we would still have roughly the same number of days with acceptable sunsets, plus we have way more days for the appropriate sunrise times.
Produced by Alex Kuzoian
EDITOR’S NOTE: This video was originally published March 11, 2016.