mazmessenger.com
Daylight saving time (DST) will begin in México on April 5, the first Sunday
in April, except for the municipalities located less than 20 kilometers from the
USA border. Those municipalities changed to DST on March 8, the second Sunday in
March, along with the United States and Canada.
Although the United States adopted DST in 1986, México did no adopt it until 1996. Prior to 1996 the state of Baja California was the only state to observe DST. The state of Sonora has never adopted DST because of the non-observance of DST by Arizona and its important economic ties with that US state.
This will be the first year in which the state of Quintana Roo will not observe DST. That state also changed its time zone this year from Central Standard Time to Eastern Standard Time.
Many people are confused about the origin, which has created several myths. A few of them are:
A little more vitamin D from the sun may be healthy, but not the way DST provides it. Experts have noted that when DST starts and ends there are noticeable spikes in workplace accidents, suicide and headaches. One 2009 study found a 5.7 percent increase in injuries among mine workers in the week after the start of DST, which researchers believe is most likely due to disruption in the workers’ sleep cycles. An Australian study found a slight uptick in male suicides in the weeks following time shifts, which the researchers blamed on the destabilizing effect of sleep disruption on people with mental health problems. Some physicians say that changes in circadian rhythm can trigger cluster headaches, leading to days or weeks of discomfort.
A study by the California Energy Commission found the energy savings to be a paltry 0.18 percent. An Indiana study found a slight increase in energy use after the entire state adopted DST; the researchers believed that more air conditioning in the evening was largely to blame.
(from The Washington Post)
Although the United States adopted DST in 1986, México did no adopt it until 1996. Prior to 1996 the state of Baja California was the only state to observe DST. The state of Sonora has never adopted DST because of the non-observance of DST by Arizona and its important economic ties with that US state.
This will be the first year in which the state of Quintana Roo will not observe DST. That state also changed its time zone this year from Central Standard Time to Eastern Standard Time.
Many people are confused about the origin, which has created several myths. A few of them are:
- Daylight saving time was meant to help farmers.
- The extra daylight makes us healthier and happier.
A little more vitamin D from the sun may be healthy, but not the way DST provides it. Experts have noted that when DST starts and ends there are noticeable spikes in workplace accidents, suicide and headaches. One 2009 study found a 5.7 percent increase in injuries among mine workers in the week after the start of DST, which researchers believe is most likely due to disruption in the workers’ sleep cycles. An Australian study found a slight uptick in male suicides in the weeks following time shifts, which the researchers blamed on the destabilizing effect of sleep disruption on people with mental health problems. Some physicians say that changes in circadian rhythm can trigger cluster headaches, leading to days or weeks of discomfort.
- It helps us conserve energy.
A study by the California Energy Commission found the energy savings to be a paltry 0.18 percent. An Indiana study found a slight increase in energy use after the entire state adopted DST; the researchers believed that more air conditioning in the evening was largely to blame.
(from The Washington Post)
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