Set the alarm clock for 3:50 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 3:50 am alarm

  • Asleep by 6:35 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 8:05 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 9:35 pm — 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.

3:50 am across the country

London3:50 am
Birmingham3:50 am
Manchester3:50 am
Glasgow3:50 am
Belfast3:50 am

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

How to use the online alarm clock

You are watching the clock while the final customer finishes their drink and the bar settles into silence. An alarm for 3:50 am gives you a clear moment to begin closing: check the till, gather glasses and note anything for the morning staff. With 4:00 am close enough to shape the last few jobs, you can avoid repeatedly checking your phone.

While you move between the counter and cellar, the alarm page can sit behind another browser tab and continue counting towards 3:50 am. Returning to it lets you confirm that it is still active and that the selected sound is audible. If the alarm tab is closed or the phone or laptop falls asleep, no sound will play, which could leave the bar closing unfinished at the intended time. Keeping the screen awake and checking the page before stepping away reduces that risk.

Closing a bar deep into the night can still mean working in a warm room, especially after the doors are locked and the air feels still. At 3:50 am, use the remaining air conditioning where permitted while finishing physical jobs such as moving chairs or carrying crates. If some zones have already been switched off, complete the warmer areas first and leave quieter paperwork for the cooler part of the premises.

Common questions

What happens if my laptop goes to sleep before 3:50 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.

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.

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.