Set the alarm clock for 10:23 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 10:23 am alarm

  • Asleep by 1:08 am — 6 full sleep cycles, about 9 hours
  • Asleep by 2:38 am — 5 full sleep cycles, about 7 hours
  • Asleep by 4:08 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.

10:23 am across the country

Sydney10:23 am
Brisbane10:23 am
Adelaide9:53 am
Perth8:23 am
Darwin9:53 am

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

How to use the online alarm clock

If mornings mean footy training drop-offs, an early meeting, or getting the kids to school on time, 10:23 am is worth locking in properly. This rings straight from your browser at 10:23 am, and keeps ringing until you tell it to stop. No phone required nearby.

After picking a tone, press Start and leave the page open. It doesn't need an internet connection once it's running, but it does need the tab itself to stay open, so avoid closing the browser or letting the device fall asleep before the time is reached.

Compared to a phone, this alarm has one job and nothing else competing for attention — no messages, no app switching. It's free and doesn't ask for sign-up, but it only works while the tab is open and the device stays awake, so it suits daytime use at a desk better than an overnight bedroom alarm. On a 24-hour clock 10:23 am is written 10:23, and spoken aloud it's twenty-three minutes past ten in the morning. Timetables and rosters may show it as 10:23, and handwritten notes as 10.23 am. 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.