Set the alarm clock for 8:48 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 8:46 am Alarm clock for 8:47 am Alarm clock for 8:49 am Alarm clock for 8:50 am

Going to bed for a 8:48 am alarm

Asleep by 11:33 pm — 6 full sleep cycles, about 9 hours
Asleep by 1:03 am — 5 full sleep cycles, about 7 hours
Asleep by 2:33 am — 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.

8:48 am across the country

Sydney	8:48 am
Brisbane	8:48 am
Adelaide	8:18 am
Perth	6:48 am
Darwin	8:18 am

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

Online alarm clock for 8:48 am

As you swap with a mate during a riverside run before the heat builds, set the alarm for 8:48 am to mark the handover clearly. That leaves enough breathing room to pass along the planned route, water and meeting point before 9:00 am, without turning the changeover into a rushed roadside conversation.

Before relying on the signal, run a quick test while you are still getting ready for the riverside. Set a near-term alarm, raise the volume to a level you can hear outdoors and confirm the sound plays as expected. A closed browser or sleeping phone means the alarm will not sound for the riverside run, so use a separate backup if missing the handover would leave your mate waiting.

Once the next runner takes over, allow for the trip away from the waterfront rather than treating 8:48 am as the end of the commitment. Morning traffic can be building around Australian commuter routes by then, and a car park exit, pedestrian crossing or busy junction may add several minutes. Check the journey time before setting off and agree on a pickup spot that does not require either runner to cross a congested road.

Common questions

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.

Why use a browser alarm instead of my phone's built-in one?

Mainly for reliability against silent mode, do-not-disturb, or a phone left charging out of earshot. It's a useful backup or a desk-based alternative, though it depends on this tab staying open rather than running in the background of your phone.