Set the alarm clock for 11:59 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 11:57 am Alarm clock for 11:58 am

Going to bed for a 11:59 am alarm

Asleep by 2:44 am — 6 full sleep cycles, about 9 hours
Asleep by 4:14 am — 5 full sleep cycles, about 7 hours
Asleep by 5:44 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.

11:59 am across the country

Sydney	11:59 am
Brisbane	11:59 am
Adelaide	11:29 am
Perth	9:59 am
Darwin	11:29 am

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

How to use the online alarm clock

Setting an alarm for 11:59 am in the middle of the day sounds unnecessary until you've missed a lunch meeting because you were heads-down in something else. This rings through your browser at 11:59 am, loud enough to notice at a desk, without needing your phone within reach.

Choose a sound before you press Start — something like a chime or a classic bell tends to work better than anything too gentle. Once it's running, the countdown happens right here in the browser, which means the tab needs to stay open in the background rather than being closed.

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 11:59 am is written 11:59, and spoken aloud it's one minutes to twelve in the afternoon. Written the Australian way that's 11.59 am, and typed in a hurry it's often 11:59am. 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

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.