Set the alarm clock for 11:50 pm

 

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

The alarm goes off in: ::
 
 

11:50 pm across the country

London11:50 pm
Birmingham11:50 pm
Manchester11:50 pm
Glasgow11:50 pm
Belfast11:50 pm

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

How to use the online alarm clock

Pulling yourself away from an unfinished job to leave for the neighbourhood patrol is easier when 11:50 pm has a clear boundary. The alarm marks the point for putting things down, collecting your coat and torch, and heading outside. That leaves a practical ten-minute margin before 12:00 am for locking up and reaching the agreed meeting place.

For this patrol reminder, the phone’s sound settings deserve a check before attention returns to the task in progress. Silent mode, reduced media volume or connected headphones may make the alert too quiet to notice from across the room. A browser alarm cannot bring you out for the patrol if its page is no longer running or the phone has settled into sleep, so a separate built-in alarm provides sensible cover.

Coming back after a late patrol can leave less sleep than expected, especially when small jobs are postponed until midnight. Clothes for the morning, keys and anything needed for breakfast can be placed ready before leaving at 11:50 pm. On returning, there is then less reason to switch on bright lights or start searching through cupboards, and the remaining night can begin with fewer delays.

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.