Set the alarm clock for 12:37 am

 

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

The alarm goes off in: ::
 
 

12:37 am across the country

London12:37 am
Birmingham12:37 am
Manchester12:37 am
Glasgow12:37 am
Belfast12:37 am

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

How to use the online alarm clock

Before handing the tent inspection to the next person, set a 12:37 am alarm so the changeover does not leave the Lake District campsite unchecked after the storm. Confirm who will respond when it sounds and which pitches still need attention. That leaves a clear handover point before 1:00 am, without relying on a tired colleague to remember a spoken time.

For this storm check, the alarm needs an audible route through the phone rather than a setting that quietly suppresses alerts. Check the sound level and silent-mode switch, then use the alarm’s test if available before passing responsibility across. Keep the alarm page running and the phone awake: if either stops operating overnight, no sound will arrive to prompt the tent inspection. A separate built-in alarm is a sensible backup for work that cannot wait.

People moving between tents can miss a soft alert because gusts, flapping fabric and rain on flysheets may still be loud at 12:37 am. Put the phone close enough to hear but somewhere dry, and choose a tone that differs from routine notifications. As the campsite settles towards 1:00 am, changing background noise can make an alert suddenly clearer or less noticeable, so the person taking over should know both the sound and the planned response.

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.