Set the alarm clock for 3:33 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 3:31 am Alarm clock for 3:32 am Alarm clock for 3:34 am Alarm clock for 3:35 am

Going to bed for a 3:33 am alarm

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

3:33 am across the country

Sydney	3:33 am
Brisbane	3:33 am
Adelaide	3:03 am
Perth	1:33 am
Darwin	3:03 am

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

Online alarm clock for 3:33 am

You have just woken at 3:33 am, with the freight manifest for the overnight Bass Strait crossing still waiting to be checked. Set the alarm for this exact time so you can gather your thoughts before looking at cargo details, departure notes and any last-minute changes. That leaves a useful window before 4:00 am without making the whole night feel like the start of the working day.

Because the manifest matters before the sailing moves ahead, test the alarm sound now rather than discovering a problem when you need the alert. Keep the volume clearly audible, confirm that your browser can play sound, and leave the alarm page active. Your manifest check may start late if the page has been closed or the computer has gone to sleep, as a browser alarm cannot sound in those conditions.

Before settling into the paperwork at this hour, have some water nearby and choose a small, familiar snack only if you are hungry. A full meal can wait until the manifest is finished or the usual breakfast time arrives. Keeping the food simple also means fewer crumbs, spills and distractions around shipping notes while the rest of Australia is largely quiet and the Bass Strait service is preparing for its crossing.

Common questions

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.

Will the alarm still ring if I close the browser tab?

No. The alarm only runs while this tab stays open — closing it, or closing the browser entirely, stops the countdown before it can ring. Keep the tab open in the background if you need it to go off later.