Set the alarm clock for 11:33 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 11:33 am alarm

  • Asleep by 2:18 am — 6 full sleep cycles, about 9 hours
  • Asleep by 3:48 am — 5 full sleep cycles, about 7 hours
  • Asleep by 5:18 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.

11:33 am across the country

London11:33 am
Birmingham11:33 am
Manchester11:33 am
Glasgow11:33 am
Belfast11:33 am

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

How to use the online alarm clock

Break away from the job in front of you at 11:33 am so you have time to gather your papers and attend the school governors’ meeting. An alarm at this point can stop a small task from carrying you straight past the moment to leave. With 27 minutes before 12:00 pm, there is enough space to finish one sensible stopping point rather than starting another piece of work.

Match the alert sound to how difficult it will be to leave your current task. A gentle tone suits a quiet desk or shared office when you are already watching the clock; a more insistent sound is useful if paperwork, a household chore or concentrated reading could absorb your attention. Set the volume where you can hear it without disrupting everyone nearby. Closing this page or allowing your phone to sleep means the meeting alarm will not sound, so keep another reminder if missing your departure would matter.

Before heading to a late-morning governors’ meeting, have a glass of water and, if needed, a small snack that will not delay you. Leave a full lunch or a fresh hot drink until afterwards, particularly if it could make you rush at 11:33 am or arrive carrying something awkward. Put any travel mug beside your bag now, ready for later, instead of adding another task just before noon.

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 11:33 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.