Set the alarm clock for 4:37 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 4:35 am Alarm clock for 4:36 am Alarm clock for 4:38 am Alarm clock for 4:39 am

Going to bed for a 4:37 am alarm

Asleep by 7:22 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:52 pm — 5 full sleep cycles, about 7 hours
Asleep by 10:22 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.

4:37 am across the country

Sydney	4:37 am
Brisbane	4:37 am
Adelaide	4:07 am
Perth	2:37 am
Darwin	4:07 am

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

Online alarm clock for 4:37 am

While preparing ahead for the water restriction, set the 4:37 am alarm as a reminder to check that the irrigation is switched off. That leaves a clear checkpoint before 5:00 am, without relying on remembering the task while half awake. Keep the controller or outdoor tap accessible so the check stays quick and quiet.

Your irrigation check needs a signal loud enough to cut through an air conditioner, ceiling fan or early-morning traffic. Set the phone volume beforehand and avoid leaving it beneath bedding or inside a bag, where the sound may be muffled. This alarm is not a background service: if the browser is no longer running or the phone goes to sleep, the irrigation check will receive no alert. A separate phone alarm is a sensible backup when missing the restriction matters.

Preparing for a 4:37 am check is easier if food and drink are kept simple beforehand. Have some water ready, particularly if walking outside to inspect taps or sprinklers, but leave a noisy kettle, clattering dishes or a full breakfast until after the irrigation is confirmed off. At this hour, setting out a bottle and a small snack earlier avoids waking other people while still making the brief night task comfortable.

Common questions

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.

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.