Set the alarm clock for 8:42 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 8:40 am Alarm clock for 8:41 am Alarm clock for 8:43 am Alarm clock for 8:44 am

Going to bed for a 8:42 am alarm

Asleep by 11:27 pm — 6 full sleep cycles, about 9 hours
Asleep by 12:57 am — 5 full sleep cycles, about 7 hours
Asleep by 2:27 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.

8:42 am across the country

London	8:42 am
Birmingham	8:42 am
Manchester	8:42 am
Glasgow	8:42 am
Belfast	8:42 am

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

How to use the online alarm clock

While you are warming the changing room for the school match, set the alarm for 8:42 am so you know when to break off and check the space. That leaves a useful point before 9:00 am for adjusting the heating, moving any kit away from radiators and returning to the next job without repeatedly watching the clock.

A changing-room task can keep your hands and attention occupied, so check where the alarm sound will actually play before carrying on. Headphones may remain connected after you have stopped wearing them, quietly taking the alert with them; play a brief test and disconnect them if the room speakers should sound instead. Keep the alarm page running and the computer awake, because otherwise no alert will pull you away from warming the changing room.

As pupils and staff begin moving around the school, the background noise near the changing room may rise quickly by 8:42 am. Put the computer somewhere the alert will not be muffled by benches, bags or a closing door, and choose a volume that remains distinct from conversation and corridor bustle. A separate kitchen timer can provide sensible backup if you expect the area to become especially lively before the match.

Common questions

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.

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.