Set the alarm clock for 9:20 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 9:18 am Alarm clock for 9:19 am Alarm clock for 9:21 am Alarm clock for 9:22 am

Going to bed for a 9:20 am alarm

Asleep by 12:05 am — 6 full sleep cycles, about 9 hours
Asleep by 1:35 am — 5 full sleep cycles, about 7 hours
Asleep by 3:05 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.

9:20 am across the country

London	9:20 am
Birmingham	9:20 am
Manchester	9:20 am
Glasgow	9:20 am
Belfast	9:20 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 Oxfam shift still feels like the next part of the day rather than something already under way. Set the alarm for 9:20 am, then use the time before 10:00 am to get dressed, gather your keys and check what you need for the charity shop.

Your Oxfam shift could begin badly if the alarm sound has quietly been routed to headphones you are not wearing. Before settling back for a few minutes, play a test sound and confirm that it comes from the phone or computer speaker at a useful volume. Do not rely on this browser alarm as the sole safeguard for your Oxfam shift: it may fall silent if you leave the page or your phone goes to sleep. A separate phone alarm can cover that risk.

Heading out for the charity shop on a British morning can feel different from what the forecast temperature suggests. Check the humidity as well as the air temperature, since damp air at 9:20 am may make a light jacket feel useful even when the reading looks mild. If the air outside feels close, leave enough time to walk steadily rather than rushing, and choose a layer that is easy to remove once you reach the shop.

Common questions

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.

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.