Set the alarm clock for 12:12 am

 

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

The alarm goes off in: ::
 
 

12:12 am across the country

London12:12 am
Birmingham12:12 am
Manchester12:12 am
Glasgow12:12 am
Belfast12:12 am

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

How to use the online alarm clock

Getting ready early to meet your relative from a National Express night coach gives you time to check the stop, set out your keys and arrange your journey before leaving. Set the alarm for 12:12 am now, while those details are still in mind. That leaves a useful margin before 1:00 am if the coach is due later or you need to walk from a nearby car park.

While you prepare for the coach arrival, leave this alarm page somewhere easy to return to and check that your sound is audible. A browser moved into the background may be slowed or suspended, so confirm that the countdown is still running after switching between apps. If the browser is no longer active or the phone settles into sleep, the alarm may not sound and your relative could be left waiting at the stop. A separate phone alarm is a sensible backup for the meeting.

Before heading out into the night, lower the screen brightness and use a warmer display setting while checking the coach details. Bright white light can feel harsh in a dark room or at a dimly lit stop, especially when you glance at the time repeatedly. Keep the essential journey information on one screen, then put the phone away until the 12:12 am alert is due.

Common questions

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.

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.