Set the alarm clock for 4:22 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 4:20 am Alarm clock for 4:21 am Alarm clock for 4:23 am Alarm clock for 4:24 am

Going to bed for a 4:22 am alarm

Asleep by 7:07 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:37 pm — 5 full sleep cycles, about 7 hours
Asleep by 10:07 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.

4:22 am across the country

London	4:22 am
Birmingham	4:22 am
Manchester	4:22 am
Glasgow	4:22 am
Belfast	4:22 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 finish packing and slip out to meet the solstice sunrise at Stonehenge, a 4:22 am alarm keeps the departure from drifting later. It leaves time to collect your coat, water and camera before 5:00 am, while the roads and parking arrangements still demand your attention.

Your Stonehenge sunrise depends on hearing the cue, so check the phone’s silent setting before relying on it: browser audio may follow that setting even when the volume appears high. Keep this page open and the phone or laptop awake, because the alarm cannot sound once the page is closed or the equipment has gone to sleep. A brief test at the volume you intend to use can reveal whether the tone is audible before you settle down.

Leaving for a solstice gathering while the house is quiet calls for a restrained alarm rather than a startling one. At 4:22 am, place the phone close enough to hear at a modest volume, preferably on a soft surface that will not amplify vibration through furniture. Prepare keys, shoes and outer layers by the door earlier, then silence the alarm promptly and move through shared rooms without switching on bright overhead lights.

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 4:22 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.