Set the alarm clock for 12:43 am

 

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

The alarm goes off in: ::
 
 

12:43 am across the country

London12:43 am
Birmingham12:43 am
Manchester12:43 am
Glasgow12:43 am
Belfast12:43 am

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

How to use the online alarm clock

As you hand the kitchen opening over to the next shift, a 12:43 am alarm can mark the moment they need to start preparing for residents’ early breakfast. There are 17 minutes before 1:00 am, enough for a brief handover covering keys, ovens, deliveries and any notes left by the night team.

Because the incoming colleague may keep their phone on silent during the handover, the alarm should be tested at a sensible volume before responsibility changes hands. This browser alarm needs an audible device rather than relying on vibration or a muted speaker. It will not sound if the page is closed or the device goes to sleep, so the kitchen opening could be missed unless someone keeps the alarm active and the screen awake.

Once the kitchen duties have been passed across, the remaining night should be planned around the next job due later that day. A small buffer after 1:00 am allows time to record what was handed over, put away anything used during the changeover and check when the next alarm is needed. Keeping that margin separate from breakfast preparation reduces the chance that one late task pushes into another before morning.

Common questions

What happens if my laptop goes to sleep before 12:43 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.

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.