Set the alarm clock for 4:24 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 4:22 am Alarm clock for 4:23 am Alarm clock for 4:25 am Alarm clock for 4:26 am

Going to bed for a 4:24 am alarm

Asleep by 7:09 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:39 pm — 5 full sleep cycles, about 7 hours
Asleep by 10:09 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.

4:24 am across the country

Sydney	4:24 am
Brisbane	4:24 am
Adelaide	3:54 am
Perth	2:24 am
Darwin	3:54 am

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

How to use the online alarm clock

Newborns don't care what time it is, and neither does an early shift roster. If 4:24 am is when you need to be up and moving, this page will ring at exactly 4:24 am through your browser, giving parents and shift workers one less thing to double-check before they finally shut their eyes.

After picking a tone, press Start and leave the page open. It doesn't need an internet connection once it's running, but it does need the tab itself to stay open, so avoid closing the browser or letting the device fall asleep before the time is reached.

Because this runs in the browser rather than on the phone's operating system, it sidesteps silent mode and do-not-disturb entirely, useful if your phone alarm has ever failed to go off for exactly that reason. Just be aware it needs the tab open and the screen or laptop lid to stay on to actually ring. On a 24-hour clock 4:24 am is written 04:24, and spoken aloud it's twenty-four minutes past four at night. Timetables and rosters may show it as 04:24, and handwritten notes as 4.24 am. If you need it loud, turn the system volume up before you start: the alarm plays at whatever the device is set to.

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.