Set the alarm clock for 4:58 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 4:56 am Alarm clock for 4:57 am Alarm clock for 4:59 am

Going to bed for a 4:58 am alarm

Asleep by 7:43 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:13 pm — 5 full sleep cycles, about 7 hours
Asleep by 10:43 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.

4:58 am across the country

London	4:58 am
Birmingham	4:58 am
Manchester	4:58 am
Glasgow	4:58 am
Belfast	4:58 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 trip to Newlyn fish auction over to the next person, 4:58 am can mark the final change of responsibility. It gives them a brief cue before 5:00 am, while you confirm that they have the keys, directions and anything else needed for the journey.

For a handover connected with Newlyn, the alarm needs to be heard by the person actually leaving. A phone left on silent may show the alert without making a useful sound, so the chosen volume and alarm tone should be tested before responsibility changes hands. Keep the browser active and the phone awake until the alarm has sounded: the alarm cannot help anyone reach the auction if the browser has been closed or the phone has gone to sleep.

Whoever takes the Newlyn journey should allow for the character of the roads at this hour, not assume that an empty route always means a quick arrival. At 4:58 am it is still night, and dark rural stretches, bends or unexpected road works can slow progress. Checking the planned route during the handover gives the next person a realistic departure point and leaves room for a steady drive rather than a rushed start.

Common questions

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.

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 4:58 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.