Set the alarm clock for 3:37 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 3:35 am Alarm clock for 3:36 am Alarm clock for 3:38 am Alarm clock for 3:39 am

Going to bed for a 3:37 am alarm

Asleep by 6:22 pm — 6 full sleep cycles, about 9 hours
Asleep by 7:52 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:22 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.

3:37 am across the country

Sydney	3:37 am
Brisbane	3:37 am
Adelaide	3:07 am
Perth	1:37 am
Darwin	3:07 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 3:37 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 3:37 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 3:37 am is written 03:37, and spoken aloud it's twenty-three minutes to four at night. Written the Australian way that's 3.37 am, and typed in a hurry it's often 3:37am. Whether you would say set alarm for 3:37 am or put an alarm on for 3:37 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.