Set the alarm clock for 8:17 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 8:17 am alarm

  • Asleep by 11:02 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 12:32 am — 5 full sleep cycles, about 7 hours
  • Asleep by 2:02 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.

8:17 am across the country

London8:17 am
Birmingham8:17 am
Manchester8:17 am
Glasgow8:17 am
Belfast8:17 am

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

How to use the online alarm clock

Watching the clock for the moment you need to open the gate to the vegetable plot can make an ordinary morning feel oddly precise. Set the alarm for 8:17 am, then keep the latch key and anything else you need nearby. That leaves the gate open well before 9:00 am without requiring you to check the time every few minutes.

Before heading out to the gate, check where the alarm sound will actually play. Wireless headphones may still be connected after you have put them down, sending the alert somewhere you will not hear it. Disconnect them or select the phone or computer speakers, raise the volume, and use the preview if available. If the browser stops running or your phone or computer falls asleep, the gate alarm will not sound, so use the device’s built-in alarm as a backup if missing 8:17 am would disrupt the job.

While you wait, choose something that will not leave you carrying a mug or plate when it is time to handle the gate. A glass of water or a quick cup of tea fits comfortably into this early slot; a cooked breakfast is easier to leave until afterwards. If toast is already ready, finish it before gathering your keys and gloves, keeping the last few minutes clear for moving outside without rushing.

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 8:17 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.