Set the alarm clock for 6:31 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 6:29 am Alarm clock for 6:30 am Alarm clock for 6:32 am Alarm clock for 6:33 am

Going to bed for a 6:31 am alarm

Asleep by 9:16 pm — 6 full sleep cycles, about 9 hours
Asleep by 10:46 pm — 5 full sleep cycles, about 7 hours
Asleep by 12:16 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.

6:31 am across the country

London	6:31 am
Birmingham	6:31 am
Manchester	6:31 am
Glasgow	6:31 am
Belfast	6:31 am

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

How to use the online alarm clock

You are halfway through packing a school bag or finding a missing PE top when 6:31 am arrives, and the alarm is the cue to break off and get your child moving towards their before-school club. There is enough space before 7:00 am for shoes, coat and a final check without letting the morning drift.

Because the club run depends on a prompt you can trust, check the sound now rather than discovering a problem when it is time to leave. Set 6:31 am, use the preview or a short test alarm, and make sure the volume is clearly audible from wherever you are finishing the preparations. This alarm depends on the browser staying active, so the child’s departure for club could pass without a signal if the phone falls asleep or the page is closed.

While the last bits are being gathered this early, keep food and drink simple enough to fit around the departure. Water and something already prepared, such as toast or a banana, are easier to manage than starting a cooked breakfast close to 7:00 am. Anything needing more time can wait until the club handover is done, avoiding another unfinished job when the alarm sounds.

Common questions

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.

Can I use this on a phone?

It works in a mobile browser, but phones lock the screen and suspend background tabs far more readily than a laptop does, which can stop the alarm sounding. For anything important, a desktop or a plugged-in laptop is the steadier option.