Set the alarm clock for 10:42 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 10:40 am Alarm clock for 10:41 am Alarm clock for 10:43 am Alarm clock for 10:44 am

Going to bed for a 10:42 am alarm

Asleep by 1:27 am — 6 full sleep cycles, about 9 hours
Asleep by 2:57 am — 5 full sleep cycles, about 7 hours
Asleep by 4:27 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.

10:42 am across the country

London	10:42 am
Birmingham	10:42 am
Manchester	10:42 am
Glasgow	10:42 am
Belfast	10:42 am

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

How to use the online alarm clock

Breaking off halfway through a job can be easy to postpone when you need to collect a prescription from the GP surgery. An alarm for 10:42 am gives you a definite stopping point, leaving time to put things down, find your keys and check the surgery’s collection hours before 11:00 am. It suits a morning when the task in front of you might otherwise keep claiming another few minutes.

Your prescription reminder can keep running while you look at another tab, although the alarm page needs to remain open in the browser. A background tab may be slowed by browser or battery settings, so leaving this page visible near 10:42 am makes the alert less dependent on how the browser manages inactive pages. If the page is closed or the phone or laptop falls asleep, the prescription alarm will not sound, which could leave you working past the moment you meant to stop.

Because other people may still be working, studying or resting at this point in the morning, choose a volume they can hear without it carrying through the whole house. Keeping the phone beside you rather than across a shared room makes a quieter alert practical. A short label such as “GP prescription” also lets anyone nearby understand why it sounded if they notice it first.

Common questions

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.

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 10:42 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.