Set the alarm clock for 11:39 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 11:37 am Alarm clock for 11:38 am Alarm clock for 11:40 am Alarm clock for 11:41 am

Going to bed for a 11:39 am alarm

Asleep by 2:24 am — 6 full sleep cycles, about 9 hours
Asleep by 3:54 am — 5 full sleep cycles, about 7 hours
Asleep by 5:24 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.

11:39 am across the country

Sydney	11:39 am
Brisbane	11:39 am
Adelaide	11:09 am
Perth	9:39 am
Darwin	11:09 am

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

Online alarm clock for 11:39 am

Breaking away from the job in front of you at 11:39 am is easier when the Perth call has a firm cue, especially while they are still in the early morning. The alarm leaves 21 minutes before 12:00 pm, enough to finish the immediate task, save your work and gather the notes you need without repeatedly checking the clock.

Your Perth call can still be missed if the phone or computer is in silent mode, even when the alarm appears to be running normally. Check the sound setting and alarm volume, then use the preview if one is available. A browser alarm also stops working when its browser session ends or the computer sleeps, so it cannot interrupt your work for the Perth call unless everything remains active.

Coming out of focused work near the end of the morning can feel abrupt when the room has warmed up. If the air conditioner is running, keep your call seat away from the direct draught and have water nearby before 11:39 am. That small setup avoids spending the opening minutes adjusting the temperature while your Perth contacts are settling into their morning.

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.