Set the alarm clock for 6:18 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 6:18 am alarm

  • Asleep by 9:03 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 10:33 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 12:03 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.

6:18 am across the country

London6:18 am
Birmingham6:18 am
Manchester6:18 am
Glasgow6:18 am
Belfast6:18 am

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

How to use the online alarm clock

Finish zipping the beach bag and leave for the start of your rock-pool hunt when the 6:18 am alarm sounds. Setting off now gives you 42 minutes before 7:00 am, so the next full hour becomes a useful landmark rather than a reason to linger indoors. Keep shoes, keys and tide-pool kit together so departure stays simple.

Because this signal marks the moment you stop preparing and head out, test its sound while there is still time to change the volume. Set a brief trial alarm, listen from where the phone will rest, then return to 6:18 am once you know it is clearly audible. Keep the alarm running and the screen awake; otherwise your rock-pool departure could pass without a sound.

An early departure can carry through a quiet house more sharply than expected, especially when bags, doors and keys join the alarm. Place the phone close enough to silence promptly, use a moderate tone, and lay out anything noisy the evening before. If someone else is sleeping nearby, wait until you are outside before fastening rattling equipment or discussing the morning’s route.

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.