@CNN: On this day in 1918, Congress passed the Standard Time Act that established time zones and daylight saving time. But a handful of studies suggest that having to change the clock is actually bad for our health https://t.co/241REsvPii https://t.co/8RnCAKkozj

On this day in 1918, Congress passed the Standard Time Act that established time zones and daylight saving time. But a handful of studies suggest that having to change the clock is actually bad for our health https://t.co/241REsvPii pic.twitter.com/8RnCAKkozj

— CNN (@CNN) March 19, 2018