Set the alarm clock for 10:31 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 10:29 am Alarm clock for 10:30 am Alarm clock for 10:32 am Alarm clock for 10:33 am

Going to bed for a 10:31 am alarm

Asleep by 1:16 am — 6 full sleep cycles, about 9 hours
Asleep by 2:46 am — 5 full sleep cycles, about 7 hours
Asleep by 4:16 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.

10:31 am across the country

Sydney	10:31 am
Brisbane	10:31 am
Adelaide	10:01 am
Perth	8:31 am
Darwin	10:01 am

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

How to use the online alarm clock

An alarm for 10:31 am works well as a backup for anyone who's slept through a phone alarm before: on a desk, on a laptop, wherever the tab's open. Set it, pick a sound you'll actually hear over the kettle, and it'll go off at 10:31 am sharp.

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 10:31 am is written 10:31, and spoken aloud it's twenty-nine minutes to eleven in the morning. You'll also see it written 10.31 am — a full stop instead of the colon means the same time. Set an alarm for 10:31 am, set the alarm to 10:31 am, set my alarm for 10:31 am — all of it lands on this page and does the same thing.

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.