Set the alarm clock for 3:20 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 3:18 am Alarm clock for 3:19 am Alarm clock for 3:21 am Alarm clock for 3:22 am

Going to bed for a 3:20 am alarm

Asleep by 6:05 pm — 6 full sleep cycles, about 9 hours
Asleep by 7:35 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:05 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.

3:20 am across the country

Sydney	3:20 am
Brisbane	3:20 am
Adelaide	2:50 am
Perth	1:20 am
Darwin	2:50 am

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

How to use the online alarm clock

An alarm for 3:20 am is usually about catching something before the rest of the world is awake: a ferry, a flight, or a change of shift. Set the time, pick a tone, and leave this tab open. At 3:20 am it'll ring through your device's speakers until you tell it to stop.

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.

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 3:20 am is written 03:20, and spoken aloud it's twenty past three at night. You'll also see it written 3.20 am — a full stop instead of the colon means the same time. 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

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.