Set the alarm clock for 4:05 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 4:03 am Alarm clock for 4:04 am Alarm clock for 4:06 am Alarm clock for 4:07 am

Going to bed for a 4:05 am alarm

Asleep by 6:50 pm — 6 full sleep cycles, about 9 hours
Asleep by 8:20 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:50 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.

4:05 am across the country

Sydney	4:05 am
Brisbane	4:05 am
Adelaide	3:35 am
Perth	2:05 am
Darwin	3:35 am

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

Online alarm clock for 4:05 am

You are halfway through checking the fruit-tree nets for flying foxes when the 4:05 am alarm needs to pull you away. Set it for the point when you must stop inspecting gaps, secure your torch and head back, rather than letting the job stretch towards 5:00 am. That clear stopping time helps when one more row of trees is tempting.

Before continuing through the orchard, check that your phone can make an audible sound even if you normally keep it on silent. Raise the alarm volume, choose a noticeable tone and run a brief test while you are still close enough to hear it. Keep the browser active and the phone awake: if either stops running, the alarm may not sound, leaving the orchard nets unchecked for longer than planned.

Because this interruption falls deep in the night, leave the return to sleep as simple as possible. Put dry footwear and a glass of water near the door, use a dim torch around the trees, and avoid starting another task after the inspection. Once the nets are checked, record only what needs attention later, then settle back down without turning the 4:05 am wake-up into the beginning of the day.

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.