Set the alarm clock for 10:00 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 10:01 am Alarm clock for 10:02 am

Going to bed for a 10:00 am alarm

Asleep by 12:45 am — 6 full sleep cycles, about 9 hours
Asleep by 2:15 am — 5 full sleep cycles, about 7 hours
Asleep by 3:45 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.

10:00 am across the country

London	10:00 am
Birmingham	10:00 am
Manchester	10:00 am
Glasgow	10:00 am
Belfast	10:00 am

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

How to use the online alarm clock

As you hand the primary-school run over to someone else, a 10:00 am alarm can mark the moment they need to leave or confirm that the child has arrived. Set it for the round hour so the changeover has one clear reference point, especially if bags, keys and a PE kit are also passing between adults.

During a busy school handover, the alarm page may slip behind messages, maps or the weather forecast. It can remain open in the background, but browser restrictions may affect sound, so check the volume and allow audio before relying on it. If the page is closed or the phone falls asleep, the school reminder may make no sound; keep the browser running and use the phone’s built-in alarm as a backup when timing cannot be missed.

Once responsibility for the school journey has changed hands, keep the rest of the morning practical: water or a quick cup of tea fits easily before 10:00 am, while a larger snack is less useful if it delays the departure or distracts from checking the child’s belongings. Save anything that needs sitting down for after the handover, when there is time to eat without watching the clock.

Common questions

Does the alarm still work if I close the tab?

No. Everything runs inside this page, so closing the tab — or quitting the browser altogether — ends the countdown there and then. Leaving it open in the background is all it asks, and switching to another tab makes no difference.

What happens if my laptop goes to sleep before 10:00 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.