Set the alarm clock for 4:03 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 4:01 am Alarm clock for 4:02 am Alarm clock for 4:04 am Alarm clock for 4:05 am

Going to bed for a 4:03 am alarm

Asleep by 6:48 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:18 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:48 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.

4:03 am across the country

Sydney	4:03 am
Brisbane	4:03 am
Adelaide	3:33 am
Perth	2:03 am
Darwin	3:33 am

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

Online alarm clock for 4:03 am

As you finish feeding your baby and head back to bed, set the alarm for 4:03 am so the next timed feed does not rely on a sleepy glance at the clock. That leaves a clear reminder before 5:00 am and lets you settle bottles, cloths and anything else you will need within easy reach.

Before you walk away, check whether the alarm sound is being sent to headphones that are still paired with your phone; otherwise, the alert can play silently beside you. Disconnect them or test the speaker at a low but audible level. If the browser stops running or the phone falls asleep, the alarm may not sound, leaving the baby’s next feed without its reminder, so keep the page active and the phone awake.

Once the feeding area is packed up, pause and listen from where you plan to sleep. A quiet Australian street at 4:03 am can make a modest alarm easy to hear, but birds, an early ute or another household member stirring may change the background noise before dawn. Set the volume just above those sounds, place the phone on a firm nearby surface, and avoid tucking it under bedding where the alert could be muffled.

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.