Set the alarm clock for 9:47 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 9:45 am Alarm clock for 9:46 am Alarm clock for 9:48 am Alarm clock for 9:49 am

Going to bed for a 9:47 am alarm

Asleep by 12:32 am — 6 full sleep cycles, about 9 hours
Asleep by 2:02 am — 5 full sleep cycles, about 7 hours
Asleep by 3:32 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.

9:47 am across the country

London	9:47 am
Birmingham	9:47 am
Manchester	9:47 am
Glasgow	9:47 am
Belfast	9:47 am

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

How to use the online alarm clock

Handing over your current task before attending a school governors’ meeting makes 9:47 am a useful moment for an alarm. It leaves a short margin to explain what has been done, pass on any keys or notes, and gather the papers you need before 10:00 am. Set the alert for 9:47 am so the changeover does not quietly run into your meeting time.

While you finish the handover, the alarm page may sit behind your email, calendar or meeting documents. A background tab should continue counting, and returning to it lets you check the selected time and alarm status. Ending the browser session or allowing the computer to sleep silences the alarm, which could leave your school governors’ meeting without its expected attendee. Keep the browser active until the alert sounds, and use a separate phone alarm if you must step away.

Leaving for a governors’ meeting in the later morning can mean moving from a cool office into unexpected heat, particularly during a warm British spell. If the air conditioning has been running, keep a light layer handy rather than dressing only for the indoor temperature. Place water beside your meeting papers now, so it goes with you at 9:47 am instead of being forgotten during the handover.

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.