Set the alarm clock for 5:09 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 5:07 am Alarm clock for 5:08 am Alarm clock for 5:10 am Alarm clock for 5:11 am

Going to bed for a 5:09 am alarm

Asleep by 7:54 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:24 pm — 5 full sleep cycles, about 7 hours
Asleep by 10:54 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.

5:09 am across the country

Sydney	5:09 am
Brisbane	5:09 am
Adelaide	4:39 am
Perth	3:09 am
Darwin	4:39 am

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

Online alarm clock for 5:09 am

Getting ready ahead of an early construction shift means setting the 5:09 am alarm while there is still time to check your gear and morning plan. Australian tradies often start before the heat builds, so this alert can mark the point for getting dressed, packing water or heading out. You then have a clear window before 6:00 am rather than watching the clock.

Before relying on the alarm for your construction shift, set it for 5:09 am and run a quick signal check at a nearby test time. Confirm that the sound is easy to recognise and the volume is high enough for where the phone will sit. If the browser is no longer active when the alarm is due, it may stay silent and leave the construction shift without its planned prompt, so keep a separate alarm as a backup.

Preparing for a construction start this early can include the temperature change between an air-conditioned room and the outdoors. Place your work clothes and water where they are easy to collect, then allow a moment away from strong air conditioning before leaving. At 5:09 am the air may feel mild, but Australian conditions can warm quickly after sunrise, making an already-packed water bottle useful once the shift is underway.

Common questions

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.

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.