How to use the online alarm clock
Waking at 12:04 am for night roadworks on the M25 means getting your bearings before reaching for boots, keys and high-visibility kit. The alarm marks the moment to get up, while 1:00 am provides a useful reference point for judging how long remains before departure or the start of the shift.
A roadworks start leaves little room to discover that a sound is too quiet, so test the alarm now and listen for it at the volume you intend to use. Check that it is clearly audible from where you are getting ready, then leave the page running. The alarm cannot protect the M25 roadworks start if the browser stops running or the machine goes to sleep, so use a separate alarm as backup when missing the time would affect the job.
Before leaving for the M25 at night, set aside a clear buffer between waking and the next commitment later that day. Use part of the 56 minutes before 1:00 am to dress, gather passes and confirm the planned route, but keep some unallocated for a misplaced key or a changed access point. That margin avoids turning every small delay into a rushed departure.
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 12:04 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.
Cookie policy