Set the alarm clock for 5:39 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 5:37 am Alarm clock for 5:38 am Alarm clock for 5:40 am Alarm clock for 5:41 am

Going to bed for a 5:39 am alarm

Asleep by 8:24 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:54 pm — 5 full sleep cycles, about 7 hours
Asleep by 11:24 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.

5:39 am across the country

London	5:39 am
Birmingham	5:39 am
Manchester	5:39 am
Glasgow	5:39 am
Belfast	5:39 am

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

How to use the online alarm clock

Waking at 5:39 am gives you a quiet moment before letting the chickens out after sunrise. You have not started the morning jobs yet, so use the alarm as a clear boundary between waking up and heading into the yard. The 21 minutes before 6:00 am leave time to get dressed, check the weather and find a torch if the light is still weak.

Clatter from the yard, a radio or someone moving around the house can easily cover a quiet signal. Set the browser alarm at a volume you can hear from where you will be waiting, then test it briefly before relying on it. Keep the sound source nearby rather than across the house. The alarm will not remind you to release the chickens if its page has been closed or the computer or phone has gone to sleep, so leave both active until it rings.

Before going out to the chickens, allow for the road you will use and how long the journey normally takes at this early hour. Traffic may be light, but dark lanes, overnight roadworks or a slow farm vehicle can still add minutes. If the poultry yard is away from home, work backwards from the planned release time and leave a small margin instead of treating 5:39 am as the departure time.

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 5:39 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.