Set the alarm clock for 4:02 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 4:00 am Alarm clock for 4:01 am Alarm clock for 4:03 am Alarm clock for 4:04 am

Going to bed for a 4:02 am alarm

Asleep by 6:47 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:17 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:47 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.

4:02 am across the country

Sydney	4:02 am
Brisbane	4:02 am
Adelaide	3:32 am
Perth	2:02 am
Darwin	3:32 am

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

Online alarm clock for 4:02 am

You have only just woken at 4:02 am, so the security handover is still ahead rather than already under way. This alarm gives you a clear cue to get up, check what you need for the site and become properly alert before meeting the incoming guard. With 5:00 am approaching, there is time to prepare without treating the whole hour as spare.

A reliable handover depends on the signal reaching you before the device slips into sleep mode. Set the alarm on a phone or laptop that can remain awake, then check that its sound is audible from where you are getting ready. If the browser page is closed or the phone or laptop falls asleep, the alarm cannot sound, which could leave the security handover without the person meant to begin it. A separate backup alarm is sensible when site coverage cannot wait.

Getting ready for an overnight site in an Australian summer can mean stepping from strong air conditioning into lingering outdoor heat. Keep your uniform and water where the cooler indoor air will not tempt you to delay, and allow a moment to adjust before leaving. At 4:02 am, setting the air conditioner slightly less cold while you prepare can make that change feel less abrupt without letting the room become stuffy.

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.