Set the alarm clock for 9:04 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 9:02 am Alarm clock for 9:03 am Alarm clock for 9:05 am Alarm clock for 9:06 am

Going to bed for a 9:04 am alarm

Asleep by 11:49 pm — 6 full sleep cycles, about 9 hours
Asleep by 1:19 am — 5 full sleep cycles, about 7 hours
Asleep by 2:49 am — 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.

9:04 am across the country

London	9:04 am
Birmingham	9:04 am
Manchester	9:04 am
Glasgow	9:04 am
Belfast	9:04 am

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

How to use the online alarm clock

Preparing to open the workshop beneath a railway arch at 9:04 am gives you time to sort the keys, lights and first jobs before anyone arrives. Set the alarm now while the opening routine is still in mind, using 10:00 am as a clear checkpoint for unlocking the doors or moving from preparation to practical work.

Because this reminder matters later rather than immediately, test the signal before relying on it. Choose 9:04 am, start the alarm, then briefly set another one a minute ahead so you can hear its volume and recognise the sound. Keep the browser active and the phone or computer awake: if the browser session ends or the equipment sleeps, the workshop alert will not sound, leaving the opening routine without its intended cue.

A railway arch can be relatively quiet early in the morning, then grow louder as trains, deliveries and nearby businesses get moving. Place the phone or laptop away from the entrance and metal shutters, where sudden clatter may mask the alarm. At 9:04 am, use a distinct tone and enough volume to carry across the workspace, but check it from the spot where you expect to be working rather than beside the speaker.

Common questions

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 9:04 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.

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.