Set the alarm clock for 8:39 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 8:37 am Alarm clock for 8:38 am Alarm clock for 8:40 am Alarm clock for 8:41 am

Going to bed for a 8:39 am alarm

Asleep by 11:24 pm — 6 full sleep cycles, about 9 hours
Asleep by 12:54 am — 5 full sleep cycles, about 7 hours
Asleep by 2:24 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.

8:39 am across the country

Sydney	8:39 am
Brisbane	8:39 am
Adelaide	8:09 am
Perth	6:39 am
Darwin	8:09 am

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

Online alarm clock for 8:39 am

You have only just woken, and opening the school pool before lessons is still the first job ahead. Set the alarm for 8:39 am, then use the lead-up to 9:00 am to get dressed, collect the pool keys and pack your togs without drifting back under the doona. The round hour provides a useful final checkpoint before the school morning gathers pace.

While you prepare for the school pool, this alarm page can remain in a background tab, although the browser may give that tab less attention than the page currently on screen. Keep the browser session available and check that your phone’s sound is audible. For the school pool opening, treat this as an on-screen reminder: once the browser session ends or the phone sleeps, there will be no alarm sound to prompt your departure.

Before heading outside at this early hour, notice whether the air feels humid rather than judging conditions through the window. Moist air can make the walk across the grounds and the pool area feel different from the forecast temperature alone. Allow a moment at 8:39 am to choose a light outer layer, and carry something dry for after the pool is unlocked and ready for lessons.

Common questions

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.

Is there a cost to use this?

No, it's free, with no sign-up and no limit on how many times you set it. It just needs the tab left open until the time you've chosen arrives.

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.