Set the alarm clock for 10:43 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 10:41 am Alarm clock for 10:42 am Alarm clock for 10:44 am Alarm clock for 10:45 am

Going to bed for a 10:43 am alarm

Asleep by 1:28 am — 6 full sleep cycles, about 9 hours
Asleep by 2:58 am — 5 full sleep cycles, about 7 hours
Asleep by 4:28 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.

10:43 am across the country

Sydney	10:43 am
Brisbane	10:43 am
Adelaide	10:13 am
Perth	8:43 am
Darwin	10:13 am

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

How to use the online alarm clock

Some people set this for 10:43 am because their phone alarm gets silenced by early notifications; others just want a second, louder reminder. Either way, pick 10:43 am, choose a sound, press start, and leave the tab open. It'll ring at 10:43 am until you close it or hit stop.

Start by selecting a tone from the dropdown, then hit Start to lock it in. From that point the page does the counting, and it'll ring once the time is reached, but only if the tab is still open somewhere on your device. Closing it, or the browser entirely, cancels the alarm.

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 10:43 am is written 10:43, and spoken aloud it's seventeen minutes to eleven in the morning. Timetables and rosters may show it as 10:43, and handwritten notes as 10.43 am. Set an alarm for 10:43 am, set the alarm to 10:43 am, set my alarm for 10:43 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.