Set the alarm clock for 2:51 am

 

Leave this tab open — the alarm only rings while the tab stays open.

The alarm goes off in: ::
 
 

2:51 am across the country

London2:51 am
Birmingham2:51 am
Manchester2:51 am
Glasgow2:51 am
Belfast2:51 am

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

How to use the online alarm clock

Pause halfway through checking the tents after a Lake District storm and set the alarm for 2:51 am, so the inspection does not swallow the rest of the night. It gives you a clear point to step away from wet guylines, loose pegs or pooled water. You can finish the immediate check and be settled again before 3:00 am.

Keep the browser open after setting the alarm and leave the sound audible while you finish checking the campsite. If you close the page or let the computer or phone go to sleep, the alarm may not sound, leaving the tents to hold your attention longer than planned. A mains connection is sensible if the battery is already low after a rough night outdoors.

Coming in from rain and wind can make a heated room feel unexpectedly stuffy at this hour. If the accommodation has air conditioning, choose a moderate setting rather than blasting cold air while damp clothes are nearby. Put wet outer layers where they can drip safely, keep the return route clear in the dark, and place the alarm within hearing distance while you warm up.

Common questions

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.

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.