Daylight Saving Time explained: When the clocks change, why we do it, and what it means

Our smartphone clocks do weird things twice a year. One day in spring, the clocks go forward an hour and the alarm goes off an hour early. We wake up and are confused until we remember what happened.

After that, “daylight saving time” will be the norm for about eight months (yes, we call it “daylight saving time”, not “daylight saving time”; I don’t make rules). And in the fall the opposite happens. Our clocks are set back one hour and we wake up refreshed, albeit a little uneasy.

Gentle chaos ensues in both annual clock changes. When the hours of the day suddenly lengthen or shorten, time itself feels like a fiction. Babies and dogs require that their previous sleeping and eating habits remain unchanged. And more consequential effects (both good and bad) may also be at play (more on that later).

Changing the clock is an all-out attack on our perception of time as an immutable law of nature. It interrupts our lives in a somewhat obscure way simply because it is the norm. Why do you think this weird thing is normal? how does that work? do we really have to do that? Will it stop?

And here is the answer.

Why daylight saving time? What does it mean?

The popular belief that Benjamin Franklin invented daylight saving time is half true.he wrote a humorous letter(opens in new tab) to the editor of Journal of Paris About accidentally waking up at 6 a.m. in 1784 and discovering that— surprise! — The sun was shining so early in the morning that he missed it by dozing until noon.In the letter, Franklin worked out some numbers and said that, mainly to save money on candles, the government is using tax incentives to make people look their eyes whenever the sun is shining. It concludes that we need to induce them to wake up. didn’t Suggest that everyone replace their watches twice a year.

If you want a single name, British residential property developer William Willett(opens in new tab) It was probably the inventor of DST who wrote the 1907 pamphlet “The Waste of Daylight”. He called it “British Summer Time”.

A New Zealand entomologist named George Hudson had quietly suggested a similar idea a few years ago.(opens in new tab) But Willett, being a wealthy businessman who was eventually able to turn his idea into a formal parliamentary proposal for the United Kingdom, gave more credit to him than Hudson, as his plan paid off. I admit, you are free to disagree with me.

Willett was an early riser and avid golfer, obsessed with the time the sun rose and set. With that in mind, he proposed his two time change phases in the year. One for him in April and one for him in September. Willett’s more elaborate time-varying phase idea would have meant his four time-varying series, each 20 minutes long, stretched over four weeks. It was dauntingly complicated, but it could have mitigated the sudden impact.

Willett’s plan may sound a little insane because of its complexity, but remember. Dusk comes annoyingly early in the warm season of standard timeIt’s warm and there’s plenty of sunshine to play some more golf in Willett’s or catch some bugs in Hudson’s. Yet all that bonus sunshine is brought forward into the morning when hardly anyone is awake.

Willett never saw his proposal adopted in his lifetime. However, the year after Willett’s death, with resource constraints from World War I, Britain implemented a plan to change the clock every hour rather than Willett’s more lenient month-long plan. and called it summer. Time Act of 1916. However, Britain adopted his DST after its wartime enemy, the German Reich, first adopted his DST. Initially, the aim was to conserve coal for the war effort, but slowly the rest of the 20th century, most of Europe, most of the English-speaking world, parts of Latin America, and some others was properly started at the location of Officially implemented time change.

It brings us to the present.It is said that about 1 billion people(opens in new tab), or about one-eighth of the world’s population now has to deal with two annual time changes. There is no extra light to be squeezed out of those hellish winter nights.

When and where does daylight saving time take place?

Without going into too much detail, most of the places where the clock changes are:

When clocks change for the start of daylight saving time in 2023

For most of us, the time change occurs at night. If you want to witness it, here’s how.

If you are in the United States and the clock does not change automatically, Wait until the early hours of March 12th at 2:00 AM to advance the clocks to 3:00 AM That lost time simply disappears into the wormhole.

This fall we need to put our clocks back one hour on the morning of November 5th If they are not self-mutating. If you want to see the actual time change, you can stay up until the night of November 4th and wait until November 5th at 2am. At that point, he sets the clock back one hour. Repeat the time that just happened.

Is daylight saving time good?

There is no objectively correct opinion about daylight saving time.

According to the book, the economic benefits of wartime clock adjustments were real and immediate Daylight Saving Time: The Curiosity and Controversial Story of Daylight Saving Time By David S. Perau. Adoption of DST has resulted in “reduction of electricity for electric lighting” in addition to “increase in overtime work”. [that] About 20% on average. “This 20% reduction in electricity use equates to “an approximate 1% reduction in total coal used for all purposes in one year.” 1% savings is gigantic.

Arguments against daylight saving time, which robs light from morning till evening, often revolve around concern for school children who have to wait for the morning bus in the dark.(opens in new tab), may be exposed to crime and may lead to an increase in car accidents. This is in contrast to a 2015 study by Brookings showing that DST reduces crime.(opens in new tab) Replacing nighttime darkness cover by one hour led to $59 million in annual savings in reduced robberies.

But it seems the clock has changed, and the chaos that entails causing real, sometimes fatal, problems. A study on the fall time change from daylight saving time to standard time strongly suggests that this event causes his 11% rise in acute depression.(opens in new tab) among susceptible people. That same time change was once also associated with a sudden 24% rise.(opens in new tab) in reports of heart attacks.another study(opens in new tab) Another time change (the spring change) is associated with a 6% increase in fatal car crashes.

This has led to a growing movement aimed at locking daylight saving time and stopping clock changes altogether.

Is daylight saving time still permanent?

no.

59% of Americans(opens in new tab) Advocate a permanent change to DST. The new system is far less technocratic. So just tweak the time forever, over an hour. The sun is overhead at 1pm instead of 12pm. This results in more sunsets throughout the year, but also more morning darkness. So some professionals who want to do away with time changes would prefer a permanent reference.time(opens in new tab).

But here in the United States, permanent daylight saving time may indeed be in force.

On March 15, 2022, the U.S. Senate unexpectedly passed a bill called the “Sunshine Protection Act.” not so soon

This bill is an interesting case study in American democracy. It was he introduced on March 9th and suddenly passed six days later by what is called unanimous consent.(opens in new tab)This means that when it was brought up for a rough first ballot, it passed without further deliberation because no one objected. That sort of thing rarely happens in the Ice Age US Senate.(opens in new tab)According to MacLeod’s report on the passage of the bill, Senators Tom Cotton and Roger Wicker were among those who expressed beliefs against ending the time change. was supposed to make it impossible to agree with them, but they simply weren’t there to disagree.

But a bill that passed very smoothly in the Senate needs to pass in the House, and that won’t be so easy. was the biggest defender of the Senate bill(opens in new tab) — but regional and logistical squabbles. According to July The Hill(opens in new tab), representatives are at odds over whether to lock on standard or daylight time. Additionally, in areas like Florida that get plenty of sunshine, you’re not too worried about locking DST, but in areas like Maine where he gets little sun most of the year, this is a nasty drawback.

Normally, the House is where bills pass quickly, and you just die in the Senate, but you’re in quirky land with this bill, and you could meet your fate in the House.

And if that doesn’t pass, we’ll have to keep changing the clock and confusing hungry dogs for years to come.

Note: This article was originally written ahead of the switch to standard time in late 2022. Edited and republished for Spring 2023.