Daylight Saving Time begins on Sunday, March 11, 2018.

Early that morning, most phones and computers will automatically shift an hour ahead .

The interruption to our internal clocks literally kills people: incidents of heart attack, strokes, and fatal vehicle accidents all spike around the start of Daylight Saving Time per year .

Daylight saving period is a killer.

The annual ritual in which we trade an hour of morning illuminate for evening brightness may seem like a harmless shift.

But each year, on the Monday after this springtime switch, hospitals report a 24% spike in heart attack visits around the country.

Just a coincidence? Likely not. Physicians learn the opposite tendency in the fall: on the Tuesday after we turn back the clocks, heart attack visits drop 21% as people get a little extra pillow time.

The reason that springing the clocks forward can kill us comes down to interrupted sleep schedules. This Sunday, instead of the clock becoming from 1:59 to 2:00 a.m. as usual, it will hop an hour to 3:00 a.m.

Researchers estimation we’ll all deprive ourselves of an additional 40 minutes of sleep because of this.

“That’s how fragile and susceptible your body is to even merely 1 hour of lost sleep, ” sleep expert Matthew Walker, author of How We Sleep, previously told Business Insider.

Walker said this “global experiment” we perform twice a year is a sign of how sensitive our bodies are to the impulses of changing schedules: in the fall, the shift is a blessing, and in the spring, it’s a fatal curse.

The tragic heart attack trend only lasts about a period, but our bodies may not fully recover from the springtime lump for weeks. We’re also prone to induce more deadly mistakes on the roads. Researchers estimate that car accidents in the US caused by sleepy daylight-saving drivers likely expense 30 extra people “peoples lives” over the nine-year period from 2002 -2 011.

“The brain, by way of attention lapses and micro-sleeps, is just as sensitive as the heart to very small perturbations of sleep, ” Walker explains in his book.

The problems don’t be brought to an end. DST also causes more the reporting of injuries at work, more strokes, and may lead to a temporary bump in suicides at this time of year, too.

For these reasons, governments like Florida and Massachusetts are starting to vestibule to trench the switching, as ABC News reports.( Hawaii and Arizona already ignore it .)

Why we ‘save’ daylight for the evenings

With daylight saving day, we’ll gain an hour of evening daylight, but what will we lose? U.S. Marine Corps photo by Lance Cpl. Adam Dublinske

Daylight Saving Time was originally concocted as a way to save energy, and implemented during The first world war in Germany. More recent research suggests it’s probably not saving us any megawatts of power at all, but there’s some proof that the evening illuminate can reduce felony and increase the time people invest exerting, at least in certain climates.

But fewer than half of the countries in the world participate in this biannual clock-changing ritual, and the tradition inevitably costs some people their lives.

So while you might enjoy the extra end-of-day light next week, be extra careful with your heart and your vehicle keys.

Read the original article on Business Insider. Follow us on Facebook and Twitter. Copyright 2017.

Read next on Business Insider: Daylight-saving time is dumb and we should get rid of it

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