Set the alarm clock for 4:09 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 4:07 am Alarm clock for 4:08 am Alarm clock for 4:10 am Alarm clock for 4:11 am

Going to bed for a 4:09 am alarm

Asleep by 6:54 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:24 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:54 pm — 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.

4:09 am across the country

Sydney	4:09 am
Brisbane	4:09 am
Adelaide	3:39 am
Perth	2:09 am
Darwin	3:39 am

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

How to use the online alarm clock

Three in the morning has its own kind of silence, and an alarm for 4:09 am breaks it on purpose. Whether you're catching a pre-dawn flight or grabbing a short nap before a long haul, this tool rings at 4:09 am through your browser so you're not relying on a phone across the room.

Choose a sound before you press Start — something like a chime or a classic bell tends to work better than anything too gentle. Once it's running, the countdown happens right here in the browser, which means the tab needs to stay open in the background rather than being closed.

The advantage of a browser alarm is volume and reliability at a desk: laptop speakers are often louder and easier to hear across a room than a phone left in a bag. The catch is that it depends entirely on the tab staying open; if the browser closes or the laptop sleeps, the alarm won't fire. On a 24-hour clock 4:09 am is written 04:09, and spoken aloud it's nine minutes past four at night. Timetables and rosters may show it as 04:09, and handwritten notes as 4.09 am. Whether you would say set alarm for 4:09 am or put an alarm on for 4:09 am, the steps are the same: pick a sound, press Start, leave the tab open.

Common questions

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.

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.