Set the alarm clock for 3:18 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 3:16 am Alarm clock for 3:17 am Alarm clock for 3:19 am Alarm clock for 3:20 am

Going to bed for a 3:18 am alarm

Asleep by 6:03 pm — 6 full sleep cycles, about 9 hours
Asleep by 7:33 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:03 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.

3:18 am across the country

London	3:18 am
Birmingham	3:18 am
Manchester	3:18 am
Glasgow	3:18 am
Belfast	3:18 am

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

How to use the online alarm clock

Break away from preparing the horses long enough to set an alarm for 3:18 am, then return to the half-finished yard work. That precise alert can separate one stage of the morning routine from the next without forcing you to keep checking the clock. With 4:00 am still ahead, there is time to finish the immediate task and move the horses on as planned.

Stable sounds can make a browser alarm less noticeable than expected, especially when doors, buckets or running water create steady background noise. Set the volume clearly above the sound already around you, and place the alarm close enough to hear without carrying it through the yard. Keep this browser alarm actively running until it sounds; otherwise it cannot call you away from the horses when 3:18 am arrives.

Moving between a dark tack room and a lit stable can make the night feel more disorientating than the clock suggests. Before continuing the preparation, leave a low yard light on along the route you will use after the alarm, while avoiding a bright lamp aimed towards the horses. At 3:18 am, that prepared lighting gives you a visible path and saves you from searching for switches with occupied hands.

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 3:18 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.