Set the alarm clock for 4:12 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 4:10 am Alarm clock for 4:11 am Alarm clock for 4:13 am Alarm clock for 4:14 am

Going to bed for a 4:12 am alarm

Asleep by 6:57 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:27 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:57 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.

4:12 am across the country

Sydney	4:12 am
Brisbane	4:12 am
Adelaide	3:42 am
Perth	2:12 am
Darwin	3:42 am

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

Online alarm clock for 4:12 am

With the final crates off the boat, you’re wrapping up the catch at the wharf and preparing to leave, so set the alarm for 4:12 am before your hands are full. It marks a clear finishing point while there is still time to secure the load, rinse the deck and have everything ready before the market opens at 5:00 am.

While you finish packing the catch, check where the alarm sound will play rather than relying on the setting alone. A phone may quietly route the alert to connected headphones left in a pocket, cabin or ute, making 4:12 am easy to miss on a noisy wharf. Disconnect them or confirm the phone speaker is active, then choose a volume you can hear nearby. Keep the browser alarm running and the phone awake; otherwise the catch may remain on the wharf when you meant to leave.

Leaving the wharf during the night can disturb people sleeping at home, especially if the alarm keeps sounding after it has done its job. Keep the phone within reach so you can silence it promptly at 4:12 am, and avoid placing it against a hard surface that amplifies vibration. If someone else in the house is asleep, use a distinct but moderate tone and prepare your keys and work gear earlier, reducing the noise you make when you return.

Common questions

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.

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.