Permanent Daylight Time and Your Mood This Winter

For most of us, November 1 used to mean one thing: an extra hour of sleep and a brighter commute. Not this year. British Columbia, Alberta, Manitoba and the Northwest Territories have all said they're sticking with permanent daylight time, so the clocks won't fall back.

Brighter evenings sound great. But a new analysis in the Canadian Medical Association Journal, published October 5, raises a real question. What happens to sleep and mood when winter sunrises show up an hour later?

Here's what the research says, who it affects most, and a simple plan for the dark months.

What changed with permanent daylight time

BC moved its clocks forward on March 8, 2026, and the province says that was the last change. Alberta, Manitoba and the NWT have since announced the same move, according to The Canadian Press.

So from November on, you keep summer's clock all year. Evenings stay lighter. Mornings stay darker, sometimes much darker.

The CMAJ authors give a sense of scale using Toronto. Ontario isn't making this switch, but the math works the same anywhere: a midwinter sunrise there would move from about 7:51 a.m. to 8:51 a.m. The analysis also notes that people living farther west within a time zone, where sunrise already comes later, tend to have worse health outcomes.

Why morning light matters for sleep and mood

Your body runs on an internal clock. Morning light is one of the main signals that sets it each day.

The CMAJ team, led by UBC psychiatrist Dr. Raymond Lam, puts it plainly: the health evidence points to standard time, largely because morning light shapes our body clocks, sleep and mood. The authors note that major sleep and chronobiology societies also favour permanent standard time.

When sunrise comes late, your alarm can go off while your body still thinks it's night. Co-author Ralph Mistlberger, a psychology professor at Simon Fraser University, describes it as waking at an earlier point in your body's cycle. Researchers call the gap "social jet lag." It's like flying one time zone east every winter morning and never quite landing.

Who feels it most

The analysis flags a few groups:

• Kids and teens, many of whom will head to school in the dark
• Shift workers
• People living on the western edge of a time zone, where sunrise comes later
• Lower-income and rural communities

If you're in one of these groups, the winter adjustment may hit harder.

Is it the winter blues or seasonal depression?

The CMAJ paper estimates that 1 to 3 percent of Canadians live with seasonal affective disorder (SAD). Up to 15 percent have milder seasonal mood changes.

The difference matters. The winter blues usually mean you feel slower and want more blankets. SAD is a form of depression that comes back around the same season each year. The U.S. National Institute of Mental Health lists signs like:

• Feeling low most of the day, nearly every day
• Losing interest in things you usually enjoy
• Sleeping a lot more than usual
• Craving carbs, and pulling away from people

Only a health professional can tell you what's going on. But if those signs stick around for two weeks or more, that's worth a conversation.

If you're in crisis or thinking about harming yourself, please reach out now. In Canada and the US, call or text 988. You can also call your local emergency number.

A dark-morning plan you can start in October

The best time to prepare for a hard season is before it starts. NIMH notes that for people with a known seasonal pattern, starting support before symptoms show up can help.

1. Take a mood snapshot now

Rate your mood, energy and sleep from 1 to 10 once a week, starting this week. October is your baseline. If December looks very different, you'll have real notes to bring to your doctor or therapist instead of a fuzzy "I've been off."

2. Get light in the first hour you're up

A 10 to 15 minute walk, a coffee by the brightest window, or a bus seat by the glass. The CMAJ authors point to early outdoor light as one way to soften dark mornings.

Ask your doctor whether a light therapy lamp makes sense for you. NIMH lists light therapy as one of the main treatments for winter-pattern SAD.

3. Keep your wake time steady

Sleeping in on weekends feels kind, but it shifts your body clock later. Try to stay within an hour of your weekday wake time.

4. Protect the evening light, too

Permanent daylight time gives you brighter evenings, so use them. A walk after work counts. Then dim screens and lights as bedtime gets closer so your body gets the "night" signal.

5. Plan people into your week

Pulling away is one of the most common winter patterns. Book the standing call or the Thursday dinner now, while it feels easy.

How therapy helps with seasonal depression

There's a specific form of talk therapy for this. NIMH describes CBT-SAD, a version of cognitive behavioural therapy built for seasonal depression. It usually runs about six weeks and focuses on two things: noticing winter-shaped thinking ("I can't do anything until spring") and scheduling activities that keep you moving and connected.

When you look for a therapist, a few questions help:

• Do you have experience with seasonal mood changes or SAD?
• Do you use CBT, or CBT-SAD specifically?
• Can we meet early in the season, before things get hard?
• Do you offer evening or online sessions? (Helpful when mornings are rough.)

New to therapy terms? Our guide to therapy types without the jargon breaks them down.

FAQ

Will permanent daylight time cause depression?

No one can say it will cause depression on its own. The CMAJ analysis says darker winter mornings may weaken the light signals that help regulate sleep and mood, which could matter most for people already prone to seasonal mood changes.

Which provinces are on permanent daylight time?

British Columbia moved to permanent daylight time on March 8, 2026. Alberta, Manitoba and the Northwest Territories have also announced year-round daylight time, so clocks there won't fall back on November 1.

What helps with dark winter mornings?

Get outdoor light within an hour of waking, keep a steady wake time, and use the brighter evenings for movement. If low mood lasts two weeks or more, talk to a doctor or therapist about options like light therapy or CBT-SAD.

You don't have to wait for spring

Darker mornings are coming whether we like it or not. How you meet them is still up to you.

If this season tends to flatten you, now is a good time to find someone in your corner. Tell Purple Lotus what you're going through, in your own words, and we'll help you find a therapist who fits: someone who gets seasonal mood, works around your schedule, and practises in your province.

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