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Daylight Saving Time: A Guide to the When, Why, What and How

March 12, 2017

Here are some interesting facts about daylight saving time (DST)!

Who observes DST and who doesn't?

  • Most part of the USA and Canada set their clocks forwards and backwards on the same dates, with some exceptions. For example, Arizona and Hawaii don’t observe DST, while Navajo Nation in Arizona does. There are also some regions in Saskatchewan (all except for Denare Beach and Creighton) and British Columbia (Creston, Charlie Lake, Taylor, Fort St. John and Dawson Creek), which don’t change their time.
  • In most countries of Europe, DST starts on the last Sunday of March and finishes on the last Sunday of October (both – at 1 AM). Another difference is that it is called “summer time” there.
  • In South America, New Zealand, southern Africa and Australia, people set their clocks one hour forward in September-November and set them back in March-April. In Australia, the Northern Territory and Queensland don’t observe DST.
  • In Russia, the government established the permanent summer time in 2011, but since sunrise in Moscow and St. Petersburg would begin too late in this case, the decision was changed. In 2014, the country switched to the permanent winter time according to the new law. As of now, they still don’t change the clock.

Daylight Saving Day

Interesting Facts and Myths

  • Latest research findings say that the number of heart attacks drastically increase on the first Monday after switching to DST. In 2014, this number increased by 24% compared with the regular average number.
  • Prior to enacting the Uniform Time Act in 1966, the USA had a period when all cities and states could choose to observe or not to observe DST. This situation led to chaos. For example, a 35-mile bus ride from West Virginia to Ohio would make a person change their clock 7 times during the trip. Ridiculous, isn’t it?
  • The Journal of Applied Psychology published a study in 2009, stating that in the first week after beginning of DST, miners had 40 minutes less sleep and got almost 6% more workplace injuries than usual.
  • Time change affects pets as well due to the change in their routine. As a result, dogs, cats and even cows become confused when you bring them food or milk later or earlier than usual.
  • There are reasons why we set the clock backwards or forward at 2 AM in the USA. Firstly, it doesn’t switch the date to yesterday. Secondly, it’s late enough to have most people come home from social outings. Thirdly, it’s early enough to avoid affecting those who work in shifts.

Now, when you know more about DST, you can surprise your friends and tell them these facts the next time we are going to change the time!


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