Set the alarm clock for 6:24 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 6:24 am alarm

  • Asleep by 9:09 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 10:39 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 12:09 am — 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.

6:24 am across the country

Sydney6:24 am
Brisbane6:24 am
Adelaide5:54 am
Perth4:24 am
Darwin5:54 am

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

Online alarm clock for 6:24 am

As you hand the school bus run over to someone else, a 6:24 am alarm gives them a clear cue to take charge. The bus stop is a ten-minute walk away, leaving enough time to collect the school bag, check for anything forgotten and head out without treating 7:00 am as the departure time.

For this handover, the alarm sound should match the household. A gentle tone may suit someone who is already awake and waiting for the cue, while a more persistent sound is useful if they are finishing another job or likely to miss one chime. The volume can be tested before relying on it. A browser alarm cannot cover a closed browser or a sleeping phone, so the school bus handover could fail without a separate built-in alarm as backup.

Before the early walk begins, the person taking over can allow a little extra travel time for crossings, damp footpaths or heavier traffic near the school. Shoes, keys and the bus pass are easier to check before leaving than halfway along the route. At this hour, keeping the ten-minute walk separate from final preparations makes the timing easier to judge and reduces the chance of reaching the stop just as the bus pulls away.

Common questions

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.

Can I use this on my phone instead of a laptop?

Yes, it works in a mobile browser the same way, but phones are more likely to lock the screen or sleep, which can stop the alarm from ringing. A laptop or desktop tends to be more reliable for this.