Set the alarm clock for 8:51 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 8:49 am Alarm clock for 8:50 am Alarm clock for 8:52 am Alarm clock for 8:53 am

Going to bed for a 8:51 am alarm

Asleep by 11:36 pm — 6 full sleep cycles, about 9 hours
Asleep by 1:06 am — 5 full sleep cycles, about 7 hours
Asleep by 2:36 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.

8:51 am across the country

Sydney	8:51 am
Brisbane	8:51 am
Adelaide	8:21 am
Perth	6:51 am
Darwin	8:21 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, 8:51 am is worth locking in properly. This rings straight from your browser at 8:51 am, and keeps ringing until you tell it to stop. No phone required nearby.

Select a sound, hit Start, and that's the whole setup. The countdown runs inside this browser tab rather than on your device's operating system, so it needs to remain open, on a phone or laptop, until the alarm actually goes off.

A browser alarm like this one is handy when your phone's on silent, charging in another room, or you just don't want to unlock it and get pulled into notifications. The trade-off is honesty: it only rings while this tab stays open, so it's not a replacement for your phone alarm on a trip where the laptop lid might close. On a 24-hour clock 8:51 am is written 08:51, and spoken aloud it's nine minutes to nine in the morning. Written the Australian way that's 8.51 am, and typed in a hurry it's often 8:51am. Set an alarm for 8:51 am, set the alarm to 8:51 am, set my alarm for 8:51 am — all of it lands on this page and does the same thing.

Common questions

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.

Can I set more than one alarm at a time?

This page is built around a single alarm at a time. For multiple alarms, open a separate tab for each one and set a different time in each, keeping every tab open until it's rung.

Why use a browser alarm instead of my phone's built-in one?

Mainly for reliability against silent mode, do-not-disturb, or a phone left charging out of earshot. It's a useful backup or a desk-based alternative, though it depends on this tab staying open rather than running in the background of your phone.