Set the alarm clock for 3:16 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 3:16 am alarm

  • Asleep by 6:01 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 7:31 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 9:01 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.

3:16 am across the country

London3:16 am
Birmingham3:16 am
Manchester3:16 am
Glasgow3:16 am
Belfast3:16 am

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

How to use the online alarm clock

Finish packing up and head out for Newlyn fish auction when the alarm sounds at 3:16 am. That leaves a sensible margin for getting down to the harbour before 4:00 am without turning the departure into a last-minute scramble. Keep your keys, waterproofs and anything needed for the morning together, so leaving is one clean movement rather than another round of searching.

For an auction departure, choose an alarm tone that matches how readily you wake. A softer sound may be enough in a quiet room and is less likely to disturb the household; a more persistent tone suits anyone prone to silencing the first note half-asleep. Set the volume before settling down and test it briefly. Because this browser alarm cannot alert you once the page is closed or the device goes to sleep, the fish auction journey needs a separate backup alarm if either could happen overnight.

Stepping outside for Newlyn harbour at this hour can mean meeting damp air, even when rain is not falling. Leave a light waterproof layer by the door and allow a moment for misted glasses or a wet windscreen before setting off. The night air may also feel sharper near the water, so clothing that handles moisture is more useful than adding bulky layers after the alarm rings.

Common questions

What happens if my laptop goes to sleep before 3:16 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.