Last night I set some clocks forward by two hours. I know you are supposed to spring forward one hour for spring but that way when I woke up today I was able to turn the clock back one hour. It is just a psychological effect but then again the whole daylight savings thing is psychological in many ways.
I see articles twice a year about “Reasons Why Daylight Saving Time Is Bad for You.” (That particular one actually says five deadly reasons, but I think that’s going a bit sensationalist.) You know that other things, like “jet lag,” can mess with your natural circadian rhythm. “Circadian” is from the Latin circa dies, meaning “approximately one day” because our natural rest–wake period rhythm is 25.5 hours. Exposure to sunlight resets the brain’s circadian clock every day.
Daylight Saving Time (DST) throws that off while Standard time is close to the sun’s natural time. When we switch into or out of DST the effects on sleep, wakefulness, mood, and general health last about 5 to 7 days. If you were not getting optimal sleep in the days before the switch, the effect are greater. One thing you can do help is get outside this morning and for the next few days and get some sunlight to help your internal clock. It will eventually reset itself, but not as quickly or easily as your smartphone.
Back in 1895, New Zealand entomologist and astronomer George Hudson proposed the idea of changing clocks by two hours every spring so that he would have more daylight hours to devote to collecting and examining insects. In 1907, British resident William Willett presented the idea as a way to save energy. But neither proposal was implemented.
Germany was the first to adopt daylight saving time on May 1, 1916, during World War I as a way to conserve fuel. The rest of Europe followed soon after. The United States didn’t adopt daylight saving time until March 19, 1918. Though we have a Uniform Time Act, there are different local DST policies across the country. For example, Hawaii has never observed daylight saving time under the Uniform Time Act, having opted out of the act’s provisions in 1967
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