Set the alarm clock for 4:27 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 4:25 am Alarm clock for 4:26 am Alarm clock for 4:28 am Alarm clock for 4:29 am

Going to bed for a 4:27 am alarm

Asleep by 7:12 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:42 pm — 5 full sleep cycles, about 7 hours
Asleep by 10:12 pm — 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.

4:27 am across the country

London	4:27 am
Birmingham	4:27 am
Manchester	4:27 am
Glasgow	4:27 am
Belfast	4:27 am

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

How to use the online alarm clock

Pause the bar close at 4:27 am so the alarm can pull you away from clearing glasses, wiping surfaces and finishing the till. Set it for the point when you need to stop the current job and move to the next closing task. With 5:00 am approaching, that interruption can keep one stubborn chore from absorbing the remaining night.

While you finish around the bar, leave the alarm page in the foreground if practical. A browser may reduce activity on a page sent behind several other tabs, particularly when the computer is conserving power, so check that the countdown is still moving before walking away. For this bar close, the alarm will not sound if the page has been closed or the computer has gone to sleep; use a separate alarm if missing the cue would delay locking up.

Once the final customers have gone, the room can shift from loud conversation and music to small noises that suddenly seem prominent. Keep the computer close enough to hear at 4:27 am, but away from clattering glass, running taps or a noisy dishwasher. Lowering nearby sound for the final few minutes makes the alert easier to distinguish without turning the volume excessively high.

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 4:27 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.