Set the alarm clock for 5:24 am

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

The alarm goes off in: ::

You can also try the other alarm clocks

Alarm clock for 5:22 am Alarm clock for 5:23 am Alarm clock for 5:25 am Alarm clock for 5:26 am

Going to bed for a 5:24 am alarm

Asleep by 8:09 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:39 pm — 5 full sleep cycles, about 7 hours
Asleep by 11:09 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.

5:24 am across the country

Sydney	5:24 am
Brisbane	5:24 am
Adelaide	4:54 am
Perth	3:24 am
Darwin	4:54 am

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

Online alarm clock for 5:24 am

Preparing the machinery before it is needed gives you time to grease the moving points, check the oil and start the engine without rushing towards the paddock. Set the alarm for 5:24 am as a firm cue to begin those checks. That leaves a useful stretch before 6:00 am for a reluctant cold start or a fitting that needs another look.

Ahead of an early machinery check, the alarm is only useful if the browser remains able to run until the set time. If the phone goes to sleep before 5:24 am, the alarm may never sound, leaving the machinery unchecked when you meant to be ready. Keep the phone awake and connected to power, turn the alarm volume up, and leave the alarm running while you prepare your boots, keys and grease gun.

Working around a shed before sunrise can make small labels, dipstick marks and grease nipples difficult to see. Put a charged torch beside the keys the night before, and position a work light where it covers the service area without shining into your eyes. At 5:24 am, use the light for the inspection rather than relying on the dim sky; by 6:00 am, changing dawn light can still hide a loose hose or a fresh leak in shadow.

Common questions

Does the alarm work if my laptop goes to sleep?

Not reliably. If the device sleeps or the screen locks, the browser tab pauses along with it, so the alarm may not fire on time or at all. Adjust your power settings if you're relying on this over a longer stretch.

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.