Set the alarm clock for 8:40 pm

 

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

The alarm goes off in: ::
 
 

8:40 pm across the country

London8:40 pm
Birmingham8:40 pm
Manchester8:40 pm
Glasgow8:40 pm
Belfast8:40 pm

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

How to use the online alarm clock

Waking at 8:40 pm with a local theatre performance still ahead means getting moving before the evening disappears. Use the alarm as the signal to sit up, check the ticket time and gather what you need. With 9:00 pm approaching, there is still a useful window for dressing and checking the route rather than rushing straight out half-awake.

Your performance reminder needs to be audible, so check the sound setting after setting the alarm for 8:40 pm. Silent mode may suppress the alert or make it too easy to miss, depending on the browser and device. Leave the volume high enough to hear from across the room and keep this page active. If the browser stops running or the device goes to sleep, the theatre alarm cannot sound, which could leave you late for the curtain.

Getting to a local theatre in the evening often takes longer than the map alone suggests, especially when parking, a bus connection or collecting tickets is involved. Keep a small buffer before the next commitment that night: note its start time now, then decide how long you can spend travelling, finding the entrance and settling into your seat. That avoids using every spare minute before leaving.

Common questions

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 8:40 pm?

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.

Can I change the sound?

Yes, there is a short list of tones to pick from before you press Start. Softer sounds are easy to sleep through, so a firmer bell tends to be the safer choice for anything early in the morning.