Set the alarm clock for 9:42 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 9:40 am Alarm clock for 9:41 am Alarm clock for 9:43 am Alarm clock for 9:44 am

Going to bed for a 9:42 am alarm

Asleep by 12:27 am — 6 full sleep cycles, about 9 hours
Asleep by 1:57 am — 5 full sleep cycles, about 7 hours
Asleep by 3:27 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.

9:42 am across the country

London	9:42 am
Birmingham	9:42 am
Manchester	9:42 am
Glasgow	9:42 am
Belfast	9:42 am

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

How to use the online alarm clock

Finish checking the mobile-library books, gather them by the door and leave when the alarm sounds at 9:42 am. That keeps the return from drifting into the rest of the morning, while still leaving 18 minutes before 10:00 am for the walk to the stop or any final notes about damaged covers.

With the library books ready to go, the alarm needs an audible route that has actually been checked. Headphones can quietly take over the sound even when they are lying on a desk, so a brief volume test reveals where the alert will play. If the browser alarm stops running, the reminder for the books cannot sound and the mobile library may depart before you arrive; keep it active until 9:42 am and use a separate backup if missing the visit would matter.

Leaving for the mobile library during the morning can affect anyone still working, sleeping or getting ready elsewhere in the house. At 9:42 am, a moderate alarm placed nearby is less disruptive than a loud tone carrying through several rooms. Keeping the books, library card, shoes and keys together also makes the departure quieter, with no last-minute search through cupboards or calls upstairs.

Common questions

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 9:42 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.