Daylight Saving Time and ADHD: Surviving the March and November Shifts

Everyone loses an hour on the second Sunday in March. For most people it is a groggy Monday and then it is over. If you have ADHD, the shift often lingers: a week of waking up wrong, missing the morning window, and a routine that was barely holding together coming loose at the seams. The November change, which is supposed to be the easy one, has its own version of this.

Daylight saving time and ADHD do not mix well, and the reason is not willpower. Many adults with ADHD already run on a body clock that sits later than the wall clock, and a routine held up by alarms and external cues rather than an internal sense of time. Move the cues by an hour and the whole arrangement wobbles. This guide covers what is going on, a three-day plan to soften the shift, how to run the Monday after, and the parts of Canada where none of this applies.

Why a one-hour shift costs ADHD adults more than a day

Three things stack up. First, a later-running body clock. Many people with ADHD find they are naturally alert late at night and slow in the morning, so a routine that already asks them to wake earlier than their body wants is being asked to wake another hour earlier still. Second, time blindness. If you do not feel an hour passing, you cannot feel that an hour has moved; the clock just seems wrong for days, and every time estimate is off. Third, fragile routines. An ADHD morning routine is often a chain of cues: alarm, light through the window, the neighbour's car, the radio program. Shift the clock and the cues come in a different order, at a different brightness, and the chain breaks.

The November change gives the hour back, which sounds like a gift. In practice it means evenings get dark at 4:30 in much of the country, the evening slump arrives earlier, and the late-night second wind arrives later. Several people describe November as the change that quietly wrecks their bedtime for a month. If sleep is a persistent problem beyond these two weeks a year, how clinicians sort out ADHD-related sleep problems in adults explains what a proper look at it involves.

Three days before: nudging bedtime and light exposure

The aim is to move your body a little each day so the clock change lands on a body that is already most of the way there. Put the change in your calendar now, with a reminder the Wednesday before. Then run this.

1. Thursday, Friday, Saturday before the March change: shift bedtime and wake time 15 to 20 minutes earlier each night. Set the alarm first; bedtime follows the alarm, not the other way around.
2. Morning light, every day, including Sunday: within 30 minutes of waking, get outside or stand at the brightest window for ten minutes. In March, that may mean a walk around the block in a coat. Bright morning light is the strongest signal your body clock listens to.
3. Dim the evening: from about two hours before the new bedtime, lower the lights and put the phone on its warmest display setting. You do not have to give up screens; just stop staring into a bright one at full brightness.
4. Move meals too: breakfast and dinner 15 minutes earlier each day. Meal timing is a quieter cue than light, but it helps.
5. For the November change: do the reverse, shifting later by 15 minutes a night, and prioritise getting outside at lunch, because that is when the daylight will be.

If you take ADHD medication at a set time each day, the clock change means your body and the bottle briefly disagree about when morning is. Keep that question for your prescriber rather than guessing; it is a quick one to ask at a follow-up. For the bigger picture on why ADHD and the body clock drift apart, how ADHD disrupts circadian rhythms is worth a read.

The Monday after: lower expectations on purpose

Most of the damage from a clock change is not the lost hour. It is what happens when you try to run a normal Monday on an abnormal body and then conclude that you are failing at something simple. Plan the Monday as a reduced day in advance, when you are thinking clearly.

• Two alarms, across the room. One at wake time, one ten minutes later. The second one is the real one; the first is a courtesy.
• No early meetings if you control the calendar. Block 8 to 10 as focus time or admin. If you do not control the calendar, at least do not schedule anything that needs you sharp.
• One must-do task, written down the night before. On Monday, do that one thing. Anything else is a bonus.
• Eat lunch outside. Daylight at midday helps anchor the new schedule. In March, even a cold ten minutes on a bench counts.
• Protect the bedtime. The pull on Monday night will be to stay up and make up for the lost hour by being awake longer. Go to bed at the new time anyway. Tuesday depends on it.

Expect the week to feel off, and treat each day as slightly better than the last rather than as a test you keep failing. By Thursday, most people are close to normal. If you are not close to normal by the next week, that is useful information about your sleep more generally, not about the clock change.

Which provinces and regions do not change their clocks

Canada is not uniform on this, and the exceptions matter if you work across time zones or have family elsewhere. As of this writing, the main ones are:

• Saskatchewan stays on Central Standard Time all year, which lines it up with Alberta in summer and Manitoba in winter. Lloydminster, straddling the Alberta border, follows Alberta and does change.
• Yukon stopped changing its clocks in 2020 and stays on a year-round time that matches Pacific Daylight Time.
• Parts of British Columbia, including the Peace River region around Fort St. John and Dawson Creek, and the Creston area, do not change.
• Eastern Quebec east of roughly the 63rd meridian, along the Lower North Shore, stays on Atlantic Standard Time year-round.
• Southampton Island in Nunavut stays on Eastern Standard Time.

Ontario and British Columbia have both passed legislation to move to permanent daylight time, but each has made it conditional on neighbouring American states doing the same, so the twice-yearly change continues there for now. If you live in a province that changes and your manager, client or parent lives in one that does not, the gap between you shifts by an hour twice a year. Write that in the calendar too; it is a surprisingly common source of missed calls.

A note in the calendar for next time

The clock change is the rare ADHD disruption that is fully predictable: the second Sunday in March and the first Sunday in November, every year. That makes it a good candidate for a system rather than a scramble. Before you close this page, set up the following so your future self does not have to remember any of it.

1. Create a recurring calendar event for the Wednesday before each change, titled something like "start shifting bedtime, 15 min a night".
2. Add a second recurring event for the Sunday itself: "change the oven, the car and the bedside clock". Phones update themselves; the car does not.
3. Put a note in the event with what worked this time. Did the three-day plan help? Did Monday go badly because of a 9 a.m. meeting? One sentence is enough.
4. If you share a household, tell the other adult the plan. A partner who keeps the lights blazing until midnight on Saturday undoes Thursday and Friday.
5. If the change tipped you into a bad sleep stretch, book the follow-up with your clinician now, while it is fresh, rather than in June when you have forgotten why.

None of this makes the hour disappear. It makes the hour a known quantity, handled in advance, which for an ADHD brain is most of the battle. For a broader look at what tends to go wrong at night and what helps, see ADHD and sleep: common issues and solutions.