Set the alarm clock for 3:28 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 3:28 am alarm

  • Asleep by 6:13 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 7:43 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 9:13 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.

3:28 am across the country

London3:28 am
Birmingham3:28 am
Manchester3:28 am
Glasgow3:28 am
Belfast3:28 am

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

How to use the online alarm clock

Lay out your waterproofs, torch and boots now so you are ready to check the tents after the storm in the Lake District when the 3:28 am alarm sounds. Keep the route across the campsite clear in your mind, with pegs and spare guy lines together, rather than leaving the preparation until 4:00 am.

A tent inspection before dawn depends on the computer or phone staying awake long enough to sound the browser alarm. Set 3:28 am, check that the volume is audible, and leave the alarm page running in the foreground. If the browser is closed or the phone or laptop goes to sleep first, the alarm will not sound for your tent check, so use a separate alarm clock as a backup for this weather-related task.

Once the storm check is finished, avoid turning the rest of the night into a long spell awake. Leave dry sleepwear beside your sleeping bag, keep a dim torch within reach and note only repairs that cannot wait until daylight. That makes it easier to settle again after 3:28 am without searching through kit, switching on bright lights or discussing every loose peg while other campers are still asleep.

Common questions

What happens if my laptop goes to sleep before 3:28 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.