Set the alarm clock for 2:33 am

 

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

The alarm goes off in: ::
 
 

2:33 am across the country

Sydney2:33 am
Brisbane2:33 am
Adelaide2:03 am
Perth12:33 am
Darwin2:03 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 2:33 am is when you need to be up and moving, this page will ring at exactly 2:33 am through your browser, giving parents and shift workers one less thing to double-check before they finally shut their eyes.

Pick whichever sound you're most likely to actually notice, then press Start. The alarm is tied to this browser tab, so it needs to stay open. Minimising the window is fine, but closing the tab or the browser will stop the countdown before it ever rings.

This works well as a second alarm, one that isn't tangled up with phone notifications, do-not-disturb settings, or low battery. It genuinely won't ring if the tab gets closed or the device goes to sleep, so treat it as a backup or a work-desk tool rather than the only alarm for something important. On a 24-hour clock 2:33 am is written 02:33, and spoken aloud it's twenty-seven minutes to three at night. Written the Australian way that's 2.33 am, and typed in a hurry it's often 2:33am. 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

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.

Can I set more than one alarm at a time?

This page is built around a single alarm at a time. For multiple alarms, open a separate tab for each one and set a different time in each, keeping every tab open until it's rung.