Set the alarm clock for 11:43 am

Leave this tab open — the alarm only rings while the tab stays open.

The alarm goes off in: ::

You can also try the other alarm clocks

Alarm clock for 11:41 am Alarm clock for 11:42 am Alarm clock for 11:44 am Alarm clock for 11:45 am

Going to bed for a 11:43 am alarm

Asleep by 2:28 am — 6 full sleep cycles, about 9 hours
Asleep by 3:58 am — 5 full sleep cycles, about 7 hours
Asleep by 5:28 am — 4 full sleep cycles, about 6 hours

A sleep cycle runs about 90 minutes, and most people take around 15 minutes to drop off. Waking at the end of a cycle feels easier than waking in the middle of one.

11:43 am across the country

London	11:43 am
Birmingham	11:43 am
Manchester	11:43 am
Glasgow	11:43 am
Belfast	11:43 am

Times are worked out live in your browser, so daylight saving is already accounted for.

How to use the online alarm clock

Finish packing your bags and set the 11:43 am alarm as the signal to leave for the market. It gives you a clear stopping point for the last few jobs, whether that means checking your list, finding your keys or putting a raincoat by the door. You will then be on your way before 12:00 pm rather than letting preparations drift into lunchtime.

Once your market preparations are nearly finished, keep this page open and the browser active so the alarm remains able to play. Check that the sound is turned up to a level you will notice from across the room, then leave the alarm visible while you complete the final task. If you close this page or the browser, or let your phone or laptop go to sleep, the alarm cannot sound, so your market departure could slip.

Before heading out late in the morning, look at how the light has changed outside since you began getting ready. A bright spell can turn quickly on a British trading day, while flat cloud may make the hallway or front step dim even close to noon. Put any bicycle lights, a small torch or reflective outer layer beside your market bags beforehand, so they are not forgotten when the 11:43 am signal sounds.

Common questions

What happens if my laptop goes to sleep before 11:43 am?

The tab sleeps along with it and the alarm will not sound on time, if at all. If you are relying on it, change the power settings so the machine stays awake, or keep a phone alarm running as well.

Do I need an account or an app?

Neither. Choose a time and a sound, press Start, and it runs in this browser tab. Nothing is downloaded, nothing is registered, and closing the page leaves nothing behind on the device.

Can I change the sound?

Yes, there is a short list of tones to pick from before you press Start. Softer sounds are easy to sleep through, so a firmer bell tends to be the safer choice for anything early in the morning.

Will it still be right when the clocks change?

Yes. It reads your device's local clock, so the move between GMT and BST at the end of March and October is picked up automatically, as long as the computer's date, time and time zone are set correctly.