Set the alarm clock for 5:33 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 5:31 am Alarm clock for 5:32 am Alarm clock for 5:34 am Alarm clock for 5:35 am

Going to bed for a 5:33 am alarm

Asleep by 8:18 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:48 pm — 5 full sleep cycles, about 7 hours
Asleep by 11:18 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.

5:33 am across the country

Sydney	5:33 am
Brisbane	5:33 am
Adelaide	5:03 am
Perth	3:33 am
Darwin	5:03 am

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

How to use the online alarm clock

If you're still up rather than getting up, setting this for 5:33 am gives you a hard stop. Daylight saving time or not, the sun won't be up yet. It works the same regardless of the season, ringing at 5:33 am sharp through your speakers, so you can finally close the laptop and get some sleep.

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.

Unlike a phone alarm, this one won't ring if you close the tab, put the computer to sleep, or shut the lid, so it suits a desk, a kitchen bench, or anywhere the device stays powered on and awake. It's free to use and doesn't need an account, but it's not built for unattended overnight use. On a 24-hour clock 5:33 am is written 05:33, and spoken aloud it's twenty-seven minutes to six in the morning. Written the Australian way that's 5.33 am, and typed in a hurry it's often 5:33am. If you need it loud, turn the system volume up before you start: the alarm plays at whatever the device is set to.

Common questions

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.

Can I change the alarm sound?

Yes, there's a short list of tones to choose from before you press Start. Pick whichever one you're most likely to actually hear — softer sounds are easier to sleep through than a firm chime or bell.

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.