Most Canadians from coast to coast will get an extra hour of sleep this weekend, but it won't come without a cost.

Clocks will roll back an hour at 2 a.m. Sunday as Daylight Saving Time comes to an end.

As a result the sun will rise and set an hour earlier, meaning dark commutes home and an increased risk of accidents as a result.

The time change won't affect everyone, though.

Clocks won't budge throughout most of Saskatchewan and in parts of rural Quebec and British Columbia, where Daylight Saving Time is not used.

Fire officials are urging those who do have to change their clocks to consider changing the batteries in their smoke detectors at the same time.