Fall Back or Stay Put: Your Sleep and the Clock Change

Most of the United States and eastern Canada set their clocks back one hour at 2:00 AM on Sunday, November 1. In Canada, that includes most of Ontario, Quebec and Atlantic Canada.^[1]

This year, the west is staying put:

• British Columbia: one time all year (UTC−7). March 8, 2026 was the province's final time change.^[2]
• Alberta and the Northwest Territories: one time all year (UTC−6).^[3][4]
• Manitoba and northwestern Ontario (Kenora, Dryden, Fort Frances and nearby): one time all year (UTC−5).^[5][6]
• Yukon and Saskatchewan already keep one time all year, since 2020 and 1966.^[7][8]

In the US, Congress has debated making daylight time permanent, but it hasn't become law.^[9]

Less than you might think. Falling back is the gentle change: the body clock adjusts to it more easily than to springing forward.^[10]

And the extra hour? In a study of 7,211 adults wearing wrist trackers, people slept about 30 to 40 minutes more that Sunday, not a full hour.^[11] Waking earlier over the following days can cancel much of that gain.^[12]

Here's the reason. Your body clock doesn't read the clock on the wall. The moment your body knows as 6:00 AM now reads 5:00 AM, so early birds may wake an hour earlier than they'd like. A small study points the same way.^[13]

Evenings also get dark an hour earlier by the clock. If you walk or cycle home, make yourself easy to see.^[14]

In the west, nothing happens on the clock this Sunday. Your sleep window doesn't move.

What changes is the light. Your province or territory changed the clock, not the sun, so winter mornings will be darker by the clock and evenings lighter.

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In Edmonton, the shortest day's sunrise moves from about 8:50 to about 9:50 AM. In Vancouver it's about 9:05, and in Winnipeg about 9:25.^[15]

Sleep scientists recommend the other choice. The American Academy of Sleep Medicine, the Sleep Research Society and the Canadian Sleep Society all favor permanent standard time.^{[16][17][18][19]} Their reason is timing: morning light moves the body clock earlier, and evening light moves it later.^[20]

The Academy also notes that the long-term effects of year-round daylight time “have not been well studied.”^[16] So this isn't a reason to worry. It's a reason to be deliberate about light.

It's not just what you do that matters, it's when you do it.

I don't recommend melatonin or sleep medications as a fix. If you're using them, talk to your physician before changing anything. And if you snore loudly, wake up gasping, or still feel exhausted with a steady sleep window, talk to your physician.

A clock change is one weekend. Your sleep window is every night.