Set the alarm clock for 4:10 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 4:08 am Alarm clock for 4:09 am Alarm clock for 4:11 am Alarm clock for 4:12 am

Going to bed for a 4:10 am alarm

Asleep by 6:55 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:25 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:55 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.

4:10 am across the country

London	4:10 am
Birmingham	4:10 am
Manchester	4:10 am
Glasgow	4:10 am
Belfast	4:10 am

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

How to use the online alarm clock

Getting ready early for a 4:10 am delivery at the pub gives you time to check the entrance, find the keys and keep the loading area clear. Set the alarm before settling into other closing jobs, then confirm that the displayed time reads 4:10 am. The early slot still leaves 50 minutes before 5:00 am, which may help you plan who will meet the driver and where the crates can be left.

While you prepare the pub, this alarm page may slip behind another tab as you check a rota or message a colleague. It should continue counting in the background, but browser settings can sometimes restrict an inactive page, so leave the alarm page open and return once to confirm it is still ready. For this delivery, the alert cannot sound if the browser has been closed or the phone or laptop has gone to sleep; use a separate alarm if missing the arrival would leave the driver waiting.

Before stepping into the dim pub at 4:10 am, lower the screen brightness and switch on a small nearby light instead of looking at a bright display in darkness. Place the phone where the alarm remains audible without facing the screen towards you. That keeps the display from dominating the room while you wait for the delivery.

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 4:10 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.