Set the alarm clock for 4:08 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 4:06 am Alarm clock for 4:07 am Alarm clock for 4:09 am Alarm clock for 4:10 am

Going to bed for a 4:08 am alarm

Asleep by 6:53 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:23 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:53 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.

4:08 am across the country

London	4:08 am
Birmingham	4:08 am
Manchester	4:08 am
Glasgow	4:08 am
Belfast	4:08 am

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

How to use the online alarm clock

Preparing early for the horses’ morning training starts with setting the 4:08 am alarm before you turn in. That gives you a clear cue to dress, gather tack and reach the yard without relying on a sleepy glance at the clock. With 5:00 am still ahead, there is time to check the planned routine and have everything ready before the first exercise begins.

Once the alarm is set, leave this page active in the foreground if possible. Moving it behind another page may allow the sound to play, but browsers can restrict background activity, particularly after a long quiet spell. Check that the volume is audible and keep the browser session running overnight. If that session stops running, the alarm cannot wake you for the horses, so use a separate alarm as a backup when missing the start would disrupt training.

Before settling down, place clothes, boots and keys where they can be picked up quietly in the dark. At 4:08 am, doors, floorboards and a loud alert may disturb other people in the house more than they would later in the morning. Choose a sound you can hear without setting it unnecessarily high, silence it promptly, and prepare anything noisy away from sleeping rooms the evening before.

Common questions

What happens if my laptop goes to sleep before 4:08 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.