Set the alarm clock for 4:00 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 4:00 am alarm

  • Asleep by 6:45 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 8:15 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 9:45 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.

4:00 am across the country

London4:00 am
Birmingham4:00 am
Manchester4:00 am
Glasgow4:00 am
Belfast4:00 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 newspaper’s morning print forms over to the next shift, a 4:00 am alarm can mark the precise point when your responsibility ends. It gives the incoming colleague a clear start time while helping you avoid staying simply because the handover feels unfinished. Before stepping away, leave a brief note covering which forms are ready, which need checking and where the final files are stored.

During a quiet overnight shift, headphones can take the alarm sound without their wearer noticing that the speakers are silent. Check the selected audio output before relying on the alert, then set a volume that is audible without disturbing the whole production floor. Keep the browser alarm running and the computer awake: otherwise the alert may never sound, leaving the morning print forms without their planned handover at 4:00 am.

Once the forms have changed hands, look ahead to the next fixed task that same day before deciding how to use the remaining night. Allow a realistic buffer for packing notes, clearing the desk and travelling home rather than treating every spare minute as available. Writing down the next commitment and its travel time can show whether there is room for proper rest or only a short pause before the day continues.

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.