Set the alarm clock for 10:55 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 10:53 am Alarm clock for 10:54 am Alarm clock for 10:56 am Alarm clock for 10:57 am

Going to bed for a 10:55 am alarm

Asleep by 1:40 am — 6 full sleep cycles, about 9 hours
Asleep by 3:10 am — 5 full sleep cycles, about 7 hours
Asleep by 4:40 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.

10:55 am across the country

London	10:55 am
Birmingham	10:55 am
Manchester	10:55 am
Glasgow	10:55 am
Belfast	10:55 am

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

How to use the online alarm clock

While wrapping up and getting ready to leave for the gas engineer, a 10:55 am alarm marks the moment to stop what you are doing. It leaves a brief window before 11:00 am for checking that your keys are in hand, the meter cupboard is accessible and any appointment details are easy to find.

With the gas engineer due, the alarm needs to be audible rather than merely visible on the screen. Check the sound level beforehand, especially if silent mode is normally enabled; browser audio may still be muted by the phone or computer. The alarm cannot alert you to the gas engineer once the browser has been closed or the phone or computer has gone to sleep, so another alarm is sensible if you must leave the screen unattended.

As you step outside near the end of the morning, everyday noise may be building around homes, pavements and nearby roads. Keep the phone somewhere the 10:55 am tone will not be muffled by a coat or bag, and choose a volume that can be heard over traffic, vacuuming or work taking place next door. A quick glance at the screen can confirm the alarm has triggered before you lock up and leave.

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.