Set the alarm clock for 5:34 am

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

The alarm goes off in: ::

You can also try the other alarm clocks

Alarm clock for 5:32 am Alarm clock for 5:33 am Alarm clock for 5:35 am Alarm clock for 5:36 am

Going to bed for a 5:34 am alarm

Asleep by 8:19 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:49 pm — 5 full sleep cycles, about 7 hours
Asleep by 11:19 pm — 4 full sleep cycles, about 6 hours

A sleep cycle runs about 90 minutes, and most people take around 15 minutes to drop off. Waking at the end of a cycle feels easier than waking in the middle of one.

5:34 am across the country

London	5:34 am
Birmingham	5:34 am
Manchester	5:34 am
Glasgow	5:34 am
Belfast	5:34 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 early start over to the next driver, set 5:34 am as the point when they must take responsibility for reaching the construction site before rush hour. It gives them a clear departure cue rather than a vague promise to leave soon, with 6:00 am providing a useful checkpoint for the journey, site gate or shift handover.

A construction-site arrival needs an alarm tone suited to where the person will be waiting. A softer sound may be enough in a quiet bedroom, while a more insistent tone makes sense if work clothes are being gathered or a kettle and radio are already on. Check the volume beforehand and leave this page running in an active browser on an awake phone or computer. If either stops running, the alarm cannot protect the construction-site handover from a missed departure.

During this early run, notice where the surroundings will become louder: a quiet room may give way to a shared hallway, an idling van or traffic gathering near the main road. Put the phone close enough to hear at 5:34 am, but away from keys or clothing that could cover its speaker. That placement keeps the signal distinct as background noise rises towards 6:00 am.

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.