Set the alarm clock for 9:03 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 9:01 am Alarm clock for 9:02 am Alarm clock for 9:04 am Alarm clock for 9:05 am

Going to bed for a 9:03 am alarm

Asleep by 11:48 pm — 6 full sleep cycles, about 9 hours
Asleep by 1:18 am — 5 full sleep cycles, about 7 hours
Asleep by 2:48 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.

9:03 am across the country

London	9:03 am
Birmingham	9:03 am
Manchester	9:03 am
Glasgow	9:03 am
Belfast	9:03 am

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

How to use the online alarm clock

While waiting to begin a circular walk on a public footpath, you can keep an eye on the minutes without setting off too soon. An alarm for 9:03 am marks the agreed moment clearly, leaving the rest of the morning available for the route. If plans have shifted towards 10:00 am, the displayed time also makes that later landmark easy to judge.

For a walk that depends on a precise start, the alarm needs a device that will remain awake until it sounds. The chosen time should stay visible after it is set, with the volume checked before the final wait begins. If the computer goes to sleep or the browser page is closed, the alarm cannot sound, so the circular walk could start later than planned. Keeping the device powered and active avoids relying on a signal it is no longer able to give.

Before stepping onto the footpath, bright morning light can make a dim screen awkward to read, while shade can have the opposite effect. Positioning the display away from direct glare and adjusting its brightness to suit the surroundings makes the 9:03 am alarm easier to check at a glance. Once the time is confirmed, looking towards the route instead of repeatedly watching the screen gives the eyes a break during the remaining wait.

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 9:03 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.