Set the alarm clock for 10:51 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 10:51 am alarm

  • Asleep by 1:36 am — 6 full sleep cycles, about 9 hours
  • Asleep by 3:06 am — 5 full sleep cycles, about 7 hours
  • Asleep by 4:36 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.

10:51 am across the country

London10:51 am
Birmingham10:51 am
Manchester10:51 am
Glasgow10:51 am
Belfast10:51 am

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

How to use the online alarm clock

You have only just woken up, and your first job is getting ready for an appointment with your family doctor. Setting the alarm for 10:51 am gives you a clear point to stop lingering, get dressed and gather anything you need for the surgery. With 11:00 am close behind, there is little room for drifting back to sleep or becoming distracted.

Your appointment depends on hearing the alarm, so check whether your phone or computer is likely to fall asleep before 10:51 am. A browser alarm may not sound if the browser is no longer running or the phone has gone into sleep mode, which could leave you late for the appointment. Keep the browser running, leave the sound audible and connect the charger if the battery is low. A separate alarm on your phone is a sensible backup when leaving on time matters.

Getting ready late in the morning can feel surprisingly warm, especially after sleeping in a room with the heating on or strong sunshine at the window. If air conditioning is running, choose a moderate setting so stepping outdoors does not feel abrupt. Put on clothes suitable for the temperature outside, take some water, and allow a moment to adjust before walking to the surgery or heading for public transport.

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.