Happy Daylight Savings Time! Personally, I am not a fan of DST. Namely because of its effects on sleep and other measures of health. More on that in a bit. First, some history.
Originally implemented in 1918, DST was a way to allegedly conserve energy during World War One but it has stuck around for over a century. Why? Who knows? The conservation angle has since been debunked. The US Congress made clock switching the law of the land in 1966, leaving in a clause for individual states not to observe DST only with permission from Congress. Thus far, only Arizona and Hawaii have gotten permission. Why just two states? Hawaii is so far south that there is little variation in day length, so DST doesn't make much sense, and Arizona elected to stay in Standard Time so that the sun would go down earlier in the summer and give its citizens mo