Set the alarm clock for 10:11 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 10:11 am alarm

  • Asleep by 12:56 am — 6 full sleep cycles, about 9 hours
  • Asleep by 2:26 am — 5 full sleep cycles, about 7 hours
  • Asleep by 3:56 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.

10:11 am across the country

London10:11 am
Birmingham10:11 am
Manchester10:11 am
Glasgow10:11 am
Belfast10:11 am

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

How to use the online alarm clock

While you wait to begin a circular walk along a public footpath, the 10:11 am alarm marks the exact moment to set off without repeatedly checking the clock. Starting then leaves 49 minutes before 11:00 am, a useful reference point for judging progress along a familiar route or reaching the next waymarker.

A gentle tone suits a quiet starting point where a sudden sound would disturb other walkers, while a more persistent signal makes sense near traffic, conversation or rustling outdoor clothing. The selected sound should be clearly audible from the pocket or bag where the phone will sit. If the browser cannot remain active until 10:11 am, the walk will receive no alarm cue, so a separate phone alarm is safer when that timing must not be missed.

Before leaving the meeting point, a brief glance at the route and any public-footpath notes reduces the need to study the screen while walking. Morning daylight can make reflections obscure small map details, so turning slightly away from glare and increasing text size can make the display easier to read. Once the route is clear, keeping the screen lowered gives the eyes a break and makes uneven ground, gates and waymarkers easier to notice.

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 10:11 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.