Most Canadians will turn their clocks back one hour at 2am on Sunday morning for the switch from daylight savings time to local standard time. That means they will get an extra hour to sleep this weekend. But it also means they will be better able to use the decreasing number of daylight hours.
The autumn change is easier to adjust to than the spring change. In spring when the clocks move forward one hour, people feel sleep deprived for a few days until they adjust to waking up earlier. A Swedish study published in 2008 indicates there is a seven per cent increase in the number of heart attacks during that time.
The number of pedestrians killed by vehicles increases after the time change in the fall, according to a 2007 study at Carnegie Mellon University in Pittsburgh, US. It seems they were three times more likely to be fatally struck during the evening rush hour.
The time does not change in the western province of Saskatchewan or in some parts of British Columbia.
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