Set the alarm clock for 9:39 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 9:37 am Alarm clock for 9:38 am Alarm clock for 9:40 am Alarm clock for 9:41 am

Going to bed for a 9:39 am alarm

Asleep by 12:24 am — 6 full sleep cycles, about 9 hours
Asleep by 1:54 am — 5 full sleep cycles, about 7 hours
Asleep by 3:24 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.

9:39 am across the country

Sydney	9:39 am
Brisbane	9:39 am
Adelaide	9:09 am
Perth	7:39 am
Darwin	9:09 am

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

How to use the online alarm clock

If the school run is tight, an alarm at 9:39 am buys you the minutes you actually need to get everyone dressed, fed, and out the door. Set the time, choose a tone that won't get ignored, and this page will ring at 9:39 am through your speakers for as long as you let it.

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.

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 9:39 am is written 09:39, and spoken aloud it's twenty-one minutes to ten in the morning. Written the Australian way that's 9.39 am, and typed in a hurry it's often 9:39am. Whether you would say set alarm for 9:39 am or put an alarm on for 9:39 am, the steps are the same: pick a sound, press Start, leave the tab open.

Common questions

Is there a cost to use this?

No, it's free, with no sign-up and no limit on how many times you set it. It just needs the tab left open until the time you've chosen arrives.

Will the alarm still ring if I close the browser tab?

No. The alarm only runs while this tab stays open — closing it, or closing the browser entirely, stops the countdown before it can ring. Keep the tab open in the background if you need it to go off later.

Does the alarm work if my laptop goes to sleep?

Not reliably. If the device sleeps or the screen locks, the browser tab pauses along with it, so the alarm may not fire on time or at all. Adjust your power settings if you're relying on this over a longer stretch.

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.