Rationale[ edit ] Industrialized societies generally follow a clock-based schedule for daily activities that do not change throughout the course of the year. The time of day that individuals begin and end work or school, and the coordination of mass transitfor example, usually remain constant year-round. In contrast, an agrarian society 's daily routines for work and personal conduct are more likely governed by the length of daylight hours   and by solar timewhich change seasonally because of the Earth's axial tilt.
It is once again that time of year for all us to remember to adjust our clocks as the Daylight Saving Time period ends in a few weeks. This year, your clocks will need set back an hour on November 4th. Robert Chandler, discusses implications of DST that go beyond the sun setting at an earlier time.
Chandler Daylight Saving Time sometimes called Daylight Savings Time is currently in use in over 70 countries worldwide and affects more than a billion people every year. The beginning and end dates vary from one country to another. DST is also the subject of controversy and much debate about its given benefits and possible negative consequences.
DST, as practiced in the U. Clocks are set ahead one hour when DST starts in the spring. This means that the sunrise and sunset occur one hour later, according to the clock, than standard time.
Congress established the Uniform Time Act of that stated DST would begin on the last Sunday of April and end on the last Sunday of October each year however, individual states still had the ability to be exempt from DST by passing a local ordinance.
Congress subsequently extended DST to a period of ten months in and eight months inin hopes to save energy following the oil embargo.
The trial period showed that DST saved the energy equivalent of 10, barrels of oil each daybut DST proved to be controversial. Many complained that the dark winter mornings endangered the lives of children going to school.
DST proponents argue that moving clocks forward offers advantages in terms of more usable daylight periods for retail sales, tourism, recreation and leisure activities, as well as personal and family time.
In addition to claims about reducing energy usage, proponents suggest that extended sunlight can be good for physical and psychological health, increased visibility to reduce traffic incidents and perhaps reducing criminal activity. There is research which provides reason to believe that DST may reduce traffic accidents.
However, some of these beneficial claims are disputed or not as clear cut. For example, energy consumption patterns have appeared to have changed since DST was originally introduced and research findings about DST energy saving benefits is limited and contradictory.
Nonetheless, controversy about the benefits and unintended negative consequences of DST has swirled about since the very first experiments with DST and continues today. There are several potentially useful significant issues to consider when thinking about implications of DST on people and their performance.
These issues fall generally into the human factors categories of technology, physical and psychological considerations. Here are some of the significant areas worthy of consideration for human performance implications of DST.
These effects may only occur for a day or two but do have a predictable short-term negative impact on people and performance. Research indicates that the transitions associated with the start and end of DST do disturb sleep patterns and make people restless at night.
Since different individuals manage time zone jet lag differently, it is difficult to identify universal impacts.
It may still be useful to note that for many people, the time zone switch is disorienting and presents perhaps idiosyncratic performance challenges. A report in the Business Insider explains some of the negative dysfunctions resulting from the annual DST shift: Light dictates how much melatonin our bodies produce.
Just like how jet-lag makes you feel all out of wack, daylight saving time is similar to just scooting one time zone over for a few months.
The sun rises later, making it more difficult to wake in the morning. This is because we reset our natural clocks using the light. When out of nowhere at least to our bodies these cues change, it causes big confusion. Like anytime you lose sleep, springing forward causes decreases in performance, concentration, and memory common to sleep-deprived individuals, as well as fatigue and daytime sleepiness.
Night owls are more bothered by the time changes than morning people. For some, it can take up to three weeks to recover from the sleep schedule changes, according to a study in the journal Sleep Medicine.
For others, it may only take a day to adjust to this new schedule.
Some studies are more ominous, though. A study published in the journal Current Biology suggested that humans never really adjust to DST.
Studies show that there is a 10 percent increase in heart attacks following the twice-annual one-hour time shifts. The body clock itself circadian rhythm can be severely disrupted for weeks after each clock shift. Some studies suggest that there may be an increase in suicides following the clock change.
A study published in in the Journal Sleep and Biological Rhythms found an uptick in suicides in Australian men during the first weeks after DST begins.It is once again that time of year for all us to remember to adjust our clocks as the Daylight Saving Time period ends in a few weeks.
Seasonal Daylight Saving Time (DST) in the U.S. ends at a.m. (the clock rolls back to a.m.) on the first Sunday of November Love it or hate it, Daylight Saving Time (DST) begins this weekend, on Sunday, March The best plan, so you don’t forget and then arrive late for your brunch date on Sunday, or worse yet.
"Daylight saving time" is considered to be the correct term for this clock-altering process, since it refers to a time for saving daylight, but "daylight savings time" is also commonly used.
Daylight Saving Time (DST) is a practice that has become commonplace in approximately 70 countries worldwide affecting over 1 billion people . In the United States DST initially began during WWI and has been consistently present in some form since World War II .
Daylight saving time and the end of it have many unexpected effects on the human body, from cluster headaches to car crashes, scientists say. Daylight-saving time (DST) has been a controversial issue ever since it has first been observed.
I believe DST is a useful and effective idea, and I would recommend continued use of it. In fact, I believe it should be observed year-round, which means America’s standard time would be moved back one hour.