Set the alarm clock for 5:10 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 5:08 am Alarm clock for 5:09 am Alarm clock for 5:11 am Alarm clock for 5:12 am

Going to bed for a 5:10 am alarm

Asleep by 7:55 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:25 pm — 5 full sleep cycles, about 7 hours
Asleep by 10:55 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.

5:10 am across the country

Sydney	5:10 am
Brisbane	5:10 am
Adelaide	4:40 am
Perth	3:10 am
Darwin	4:40 am

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

Online alarm clock for 5:10 am

Getting ready to open the school pool before lessons starts well before anyone reaches the gate, so set the alarm for 5:10 am while checking keys, access notes and the morning plan. That leaves a clear marker ahead of 6:00 am, when staff and early arrivals may begin moving through the school grounds.

While pool preparations continue, the alarm page may sit in the background as you check another screen, but the browser can reduce activity there or restrict sound unless audio and notifications are allowed. Keep the page available and the phone or computer awake enough to run it. The pool opening cannot rely on this alarm if the browser is fully closed or the device has gone to sleep, because no alert may sound when 5:10 am arrives.

Before the first swimmers appear, use the early start to protect a buffer for whatever follows the pool opening that day. Put equipment checks, water readings and gate access into a short sequence, then leave a few spare minutes before heading to the next school task. At this hour, quiet corridors can make small delays easy to overlook, so nominate a firm finishing point rather than letting preparation expand until 6:00 am.

Common questions

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.

What happens once the alarm goes off?

It rings through your device's speakers on a loop until you stop it from this page. There's no separate app notification, so make sure your volume is turned up before you rely on it.

Is this alarm accurate across daylight saving time?

It uses your device's local clock, so as long as your computer's time and date settings are correct, it'll adjust automatically when daylight saving time starts or ends.

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.