Set the alarm clock for 3:37 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 3:37 am alarm

  • Asleep by 6:22 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 7:52 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 9:22 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.

3:37 am across the country

London3:37 am
Birmingham3:37 am
Manchester3:37 am
Glasgow3:37 am
Belfast3:37 am

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

How to use the online alarm clock

Waking at 3:37 am leaves the milk van preparation still untouched: keys, route sheets, crates and the first checks are waiting. An alarm set for this exact time marks the moment to get out of bed and begin calmly, with 23 minutes available before 4:00 am. That window can cover getting dressed and making a quick start on the van before the morning milk round.

Because this alarm runs in the browser, ending the browser session stops it; the milk round could begin late if that was the only signal. The same risk applies if the computer or phone goes to sleep before 3:37 am. Keeping the alarm page active and the screen awake gives it the chance to sound, while a separate phone alarm provides sensible cover when an early departure cannot wait.

Once the van is ready, any remaining sleep is easier to judge against the next fixed task rather than the clock alone. At this point in the night, a brief return to bed may be more practical with clothes, keys and paperwork placed together, plus another alarm set for the final departure time. That avoids using the last quiet minutes repeatedly checking whether something for the route has been forgotten.

Common questions

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.

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.