When the Clocks Go Back in 2026: Taking the Pill, Insulin and Other Timed Medicines

Twice a year the clocks move and, for one night, "the same time every day" stops meaning quite the same thing. When the clocks go back this autumn, your 8pm pill on Sunday comes 25 hours after Saturday's, not 24. For most medicines that makes no difference at all. For a few, such as the traditional progestogen-only pill and some insulin routines, it's worth a minute's planning. Here are the dates, what the guidance says, and a simple way to handle it.

When the clocks go back in 2026

• UK and the EU: Sunday, October 25, 2026. At 2am BST the clocks go back to 1am (in most of the EU the change happens at the same moment, 01:00 UTC).
• US and Canada (most areas): Sunday, November 1, 2026, at 2am local time, back to 1am.
• Not changing: places that don't observe daylight saving time, such as India, most of Asia and Africa, Arizona (apart from the Navajo Nation) and Hawaii.

Phones and computers set to update automatically will change on their own. Older clocks, ovens, car dashboards and some pill timers won't.

What actually changes for a daily medicine

If you take a tablet at 8pm every evening and keep taking it at 8pm on the new clock, there is one gap of 25 hours between doses, on the night of the change. After that you're back to 24 hours.

When the clocks go forward in spring, it works the other way: one gap is 23 hours.

For most once-a-day medicines a single gap that is one hour longer or shorter is not a concern. If you're unsure about yours, a pharmacist can tell you in a minute.

The combined pill

Guidance from sources such as Planned Parenthood and Ohio State University's OB-GYN team is reassuring: with the combined pill, taking it an hour or so late is fine as long as you take it within the day. Simply carry on at your usual time on the new clock.

The progestogen-only pill (mini-pill)

This is the one to check, because there are different types with different windows:

• 3-hour pills (traditional progestogen-only pills) must be taken within 3 hours of your usual time.
• 12-hour pills (with desogestrel as the active ingredient) have a 12-hour window.
• Drospirenone pills (such as Slynd) have a 24-hour window.

Check the active ingredient on your packet or leaflet if you're not sure which you have.

A one-hour shift falls inside all of these windows, so taking your pill at your usual time on the new clock is fine. The risk is the night of the change itself, when routines slip: you sleep in, the old bedside clock shows the wrong time, or you're travelling. If a 3-hour pill ends up more than 3 hours late, NHS sexual health services advise taking it as soon as you remember and using extra contraception, such as condoms, for the next 2 days. Ask a pharmacist about emergency contraception if you've had sex in that time.

If you'd rather keep your pill at the same point in your day, some people move it by 15–30 minutes a day over a few days instead. Either approach works; ask your pharmacist if you want to be sure.

Insulin and diabetes medicines

Insulin and some diabetes tablets are timed around meals and the way your blood sugar rises and falls through the day, so the right approach depends on your regimen. Some patient guides suggest shifting the timing gradually, by 15–30 minutes a day over two or three days. Others simply switch to the new clock along with meals.

Because this varies with the type of insulin and how you use it, check with your diabetes team, doctor or pharmacist before the change rather than guessing. If you use a pump or a connected meter, check whether its clock updates by itself. Many need changing by hand.

Other medicines worth a second look

• Medicines taken several times a day at fixed intervals (for example some Parkinson's medicines or antibiotics): keep the spacing between doses, not the clock time, on the day of the change.
• Pain patches and other medicines changed every few days: a one-hour shift rarely matters, but make sure your change day and time are still right.
• Sleep and the body clock: you may feel tired or wake early for a few days. That's normal, but it's when doses get forgotten.

None of this is a reason to change a medicine on your own. If in doubt, ask your doctor or pharmacist.

A simple checklist for the weekend of the change

1. Before Saturday: check which pill type you take, and whether your insulin plan needs adjusting.
2. Saturday night: change any clocks that won't update themselves, especially the one you look at when you take your tablets.
3. Sunday: take your medicines at your usual time on the new clock (or follow your gradual plan).
4. Next few days: check your reminders still fire at the right local time.

Common questions

When do the clocks go back in 2026? On Sunday, October 25, 2026 in the UK and EU, and on Sunday, November 1, 2026 in most of the US and Canada.

Does daylight saving time affect the birth control pill? For the combined pill, an hour's shift doesn't matter. For progestogen-only pills, a one-hour shift is within the 3-hour, 12-hour and 24-hour windows. Just don't let the change make you late by more than your pill's window.

Should I take my pill at the new time or the old time? Most people simply take it at their usual time on the new clock. You can also shift it gradually over a few days. Both are fine for most pills.

Do I need to change my insulin times? It depends on your regimen. Ask your diabetes team or pharmacist; some advise a gradual 15–30 minute shift per day.

Will my phone reminders change automatically? Usually, yes, if they're set to your local time zone. Older clocks and some devices won't.

How ReminderIt helps

ReminderIt reminders are set in your own time zone, so an 8pm reminder still rings at 8pm after the clocks change, with nothing to adjust. At that time your phone rings with a natural voice reading the reminder, and a WhatsApp message arrives with Done and Snooze. If you miss the call, ReminderIt tries once more about 5 minutes later. That helps on a sleepy Sunday when your routine is off.

You set it up by messaging on WhatsApp in plain words, for example "Remind me to take my pill at 8pm every day". You can also set reminders for a parent who takes timed medicines. There's no app to install, and there's a 7-day free trial with no card. After that it's $7 a month.

Message ReminderIt on WhatsApp at https://wa.me/14786061901 to set up your medicine reminders before the clocks change.