Set the alarm clock for 10:39 am

 

Leave this tab open — the alarm only rings while the tab stays open.

The alarm goes off in: ::
 
 

Going to bed for a 10:39 am alarm

  • Asleep by 1:24 am — 6 full sleep cycles, about 9 hours
  • Asleep by 2:54 am — 5 full sleep cycles, about 7 hours
  • Asleep by 4:24 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.

10:39 am across the country

London10:39 am
Birmingham10:39 am
Manchester10:39 am
Glasgow10:39 am
Belfast10:39 am

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

How to use the online alarm clock

Hand over your current duties now so you can leave for the DVSA theory test without carrying unfinished work into the journey. An alarm for 10:39 am can mark the moment when your colleague takes over and you switch your attention to travel, identification and arrival. That still leaves a useful stretch before 11:00 am for checking the test-centre address and gathering the documents you need.

Your test-day handover only works if the alert remains able to sound. Keep this page open and the browser running after setting the alarm, with the sound turned up to a level you will notice. If you close the browser or allow the phone to sleep, the alarm cannot sound, so your departure for the DVSA theory test could be missed. A normal charger connection can also prevent an unexpected low battery from disrupting the alert.

On the way to the test centre, a late-morning walk can feel quite different depending on the humidity, even when the temperature looks mild. Check the air outside before choosing a coat: damp conditions may make a light layer more practical, while dry, still air may suit something less bulky. Keep any rain cover easy to reach rather than buried beneath your test papers.

Common questions

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.

What happens if my laptop goes to sleep before 10:39 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.