Set the alarm clock for 10:20 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 10:18 am Alarm clock for 10:19 am Alarm clock for 10:21 am Alarm clock for 10:22 am

Going to bed for a 10:20 am alarm

Asleep by 1:05 am — 6 full sleep cycles, about 9 hours
Asleep by 2:35 am — 5 full sleep cycles, about 7 hours
Asleep by 4:05 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.

10:20 am across the country

London	10:20 am
Birmingham	10:20 am
Manchester	10:20 am
Glasgow	10:20 am
Belfast	10:20 am

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

How to use the online alarm clock

Before handing the rented-home inspection over to someone else, set the alarm for 10:20 am and pass on the practical details they will need. That gives them a clear cue to meet the inspector, check the address and have the keys ready. With 11:00 am still ahead, there is also time to explain any points the landlord or letting agent expects them to cover.

Because this reminder marks a handover, test its sound before the other person relies on it. Set a brief trial alarm, confirm that the volume is audible, then return to 10:20 am and check that the displayed time is correct. The inspector reminder cannot sound after its browser page is closed or the phone has gone to sleep, so the person taking over should keep the page active and use a separate phone alarm if that cannot be guaranteed.

While the inspector is due during the late morning, agree where the handover will happen and whether anyone will be waiting outside. Warm weather can make a closed property stuffy, yet strong air conditioning may leave rooms uncomfortably cold. If access is permitted, set a moderate temperature shortly beforehand and keep the entrance clear, so the inspection can begin promptly without anyone standing around in the heat.

Common questions

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 10:20 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.

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.