Set the alarm clock for 10:02 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 10:00 am Alarm clock for 10:01 am Alarm clock for 10:03 am Alarm clock for 10:04 am

Going to bed for a 10:02 am alarm

Asleep by 12:47 am — 6 full sleep cycles, about 9 hours
Asleep by 2:17 am — 5 full sleep cycles, about 7 hours
Asleep by 3:47 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.

10:02 am across the country

London	10:02 am
Birmingham	10:02 am
Manchester	10:02 am
Glasgow	10:02 am
Belfast	10:02 am

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

Online alarm clock for 10:02 am

You are handing the mobile-library return over to someone else at 10:02 am, so set the alarm for the moment they need to leave with the books. Confirm which village stop or lay-by they are using, pass across the library card, and leave the bag by the door. With 11:00 am approaching, a clear reminder keeps the handover from becoming a rushed exchange.

Your books still need a reminder that can be heard, even when the person taking them is busy elsewhere in the house. Check the phone’s silent setting and raise the alarm volume before relying on the sound; a visible test alert alone does not confirm that the tone will play. Keep the alarm page open and the phone awake, because otherwise the alarm may not ring and the books could miss the mobile library.

The mobile-library stop may be fairly quiet when you arrange the return, but traffic, conversation and activity around the vehicle can build later in the morning. Choose an alarm sound that stands apart from those background noises, then place the phone where it will not be muffled by the book bag or a coat. A second, slightly later alarm can help if the first sounds while the handover details are still being discussed.

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 10:02 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.