Set the alarm clock for 5:39 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 5:39 am alarm

  • Asleep by 8:24 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 9:54 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 11:24 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.

5:39 am across the country

Sydney5:39 am
Brisbane5:39 am
Adelaide5:09 am
Perth3:39 am
Darwin5:09 am

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

Online alarm clock for 5:39 am

As you hand the daytime charter preparations to the next person, a 5:39 am alarm can mark the moment they need to take over. It leaves a practical window before 6:00 am for confirming the skipper has the passenger details, the gear is aboard and the marina meeting point is understood. That makes the changeover clear without turning the early start into a rushed exchange.

With other people sleeping nearby, headphones can quietly capture the alarm sound without anyone noticing. Check the selected audio output before relying on it, then leave enough volume for the signal to be heard over packing or movement around the jetty. A browser alarm cannot wake a sleeping phone or continue after its page is closed, so the charter departure could be missed unless a separate phone alarm backs it up.

Getting the incoming person to the marina is easier when the travel time is settled before the handover. Early roads may be clear, but temporary works, a long walk from parking or access through a locked marina gate can still use the spare minutes. A route check at 5:39 am, with a small arrival buffer, gives them time to park, find the correct berth and receive the final notes before the day charter leaves.

Common questions

Do I need to create an account or download anything?

No, there's nothing to sign up for and nothing to install. Pick a time and a sound, press Start, and it runs entirely in this browser tab.

Can I change the alarm sound?

Yes, there's a short list of tones to choose from before you press Start. Pick whichever one you're most likely to actually hear — softer sounds are easier to sleep through than a firm chime or bell.

What happens once the alarm goes off?

It rings through your device's speakers on a loop until you stop it from this page. There's no separate app notification, so make sure your volume is turned up before you rely on it.

Is this alarm accurate across daylight saving time?

It uses your device's local clock, so as long as your computer's time and date settings are correct, it'll adjust automatically when daylight saving time starts or ends.