Set the alarm clock for 12:31 pm

 

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

The alarm goes off in: ::
 
 

12:31 pm across the country

Sydney12:31 pm
Brisbane12:31 pm
Adelaide12:01 pm
Perth10:31 am
Darwin12:01 pm

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

How to use the online alarm clock

Shift workers switching over around midday often need an alarm that isn't tied to their phone being nearby. This one rings at 12:31 pm straight from the browser tab, so a laptop left open on the kitchen table can do the job just as well.

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 12:31 pm is written 12:31, and spoken aloud it's twenty-nine minutes to one in the afternoon. Timetables and rosters may show it as 12:31, and handwritten notes as 12.31 pm. 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.