Set the alarm clock for 9:55 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 9:53 am Alarm clock for 9:54 am Alarm clock for 9:56 am Alarm clock for 9:57 am

Going to bed for a 9:55 am alarm

Asleep by 12:40 am — 6 full sleep cycles, about 9 hours
Asleep by 2:10 am — 5 full sleep cycles, about 7 hours
Asleep by 3:40 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.

9:55 am across the country

London	9:55 am
Birmingham	9:55 am
Manchester	9:55 am
Glasgow	9:55 am
Belfast	9:55 am

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

How to use the online alarm clock

Break away from what you are doing when the 9:55 am alarm sounds, collect the lead and take your dog out for a walk on Hampstead Heath. That gives you a clear cue to stop rather than letting the current task drift past 10:00 am. Keep shoes, keys and waste bags together beforehand so leaving does not become another job.

Your Hampstead Heath walk may be competing with a television, kettle, conversation or traffic outside, so set the alarm volume while those sounds are present. Choose a signal that is distinct from ordinary notifications and place the phone close enough to hear without burying it beneath clothing. Keep the alarm page open and the phone awake, or the dog-walk reminder may not sound at all.

Because this is still morning, decide before leaving whether any sleep after the walk is genuinely part of your plan. If you intend to return to bed, darken the room first, leave fresh water ready for the dog and set a separate alarm for the time you must get up again. If the remaining sleep would be too brief for your schedule, use 9:55 am as the point when the day continues and prepare breakfast before heading out.

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.