Set the alarm clock for 5:35 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 5:33 am Alarm clock for 5:34 am Alarm clock for 5:36 am Alarm clock for 5:37 am

Going to bed for a 5:35 am alarm

Asleep by 8:20 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:50 pm — 5 full sleep cycles, about 7 hours
Asleep by 11:20 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.

5:35 am across the country

Sydney	5:35 am
Brisbane	5:35 am
Adelaide	5:05 am
Perth	3:35 am
Darwin	5:05 am

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

How to use the online alarm clock

Three in the morning has its own kind of silence, and an alarm for 5:35 am breaks it on purpose. Whether you're catching a pre-dawn flight or grabbing a short nap before a long haul, this tool rings at 5:35 am through your browser so you're not relying on a phone across the room.

After picking a tone, press Start and leave the page open. It doesn't need an internet connection once it's running, but it does need the tab itself to stay open, so avoid closing the browser or letting the device fall asleep before the time is reached.

Because this runs in the browser rather than on the phone's operating system, it sidesteps silent mode and do-not-disturb entirely, useful if your phone alarm has ever failed to go off for exactly that reason. Just be aware it needs the tab open and the screen or laptop lid to stay on to actually ring. On a 24-hour clock 5:35 am is written 05:35, and spoken aloud it's twenty-five to six in the morning. Timetables and rosters may show it as 05:35, and handwritten notes as 5.35 am. Setting the alarm to 5:35 am tomorrow morning works the same way: if the time has gone for today, the count runs through to it.

Common questions

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.

Does the alarm work if my laptop goes to sleep?

Not reliably. If the device sleeps or the screen locks, the browser tab pauses along with it, so the alarm may not fire on time or at all. Adjust your power settings if you're relying on this over a longer stretch.

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.