Set the alarm clock for 5:16 am

 

Leave this tab open — the alarm only rings while the tab stays open.

The alarm goes off in: ::
 
 

Going to bed for a 5:16 am alarm

  • Asleep by 8:01 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 9:31 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 11:01 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.

5:16 am across the country

Sydney5:16 am
Brisbane5:16 am
Adelaide4:46 am
Perth3:16 am
Darwin4:46 am

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

Online alarm clock for 5:16 am

Before handing over the shift at 5:16 am, leave the machinery lubricated, started and ready for the next person heading into the paddock. The alarm marks the handover point without forcing anyone to keep checking the clock, while the 44 minutes before 6:00 am leave a useful buffer for explaining any cold-start quirks, fuel notes or attachments that still need attention.

A machinery handover can be missed if the alarm appears silently, so the sound setting deserves a quick check before work continues. The browser alarm uses the selected tone through the phone or computer’s current audio settings; silent mode, muted media or very low volume may make the alert easy to overlook. If the browser is no longer running or the equipment has gone to sleep, the machinery changeover will not get its expected signal, so a separate alarm is sensible when timing cannot slip.

Whoever takes over may still have an early drive from the homestead, shed or another property entrance before reaching the field. At this hour, allow for unlit rural roads, wildlife near the verge, gates and slower travel on gravel rather than assuming an empty road means a quick trip. Working the likely journey time backwards from 5:16 am gives the incoming operator a realistic departure time and keeps the engine preparation from becoming a rushed roadside arrival.

Common questions

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.

Does the alarm work if my laptop goes to sleep?

Not reliably. If the device sleeps or the screen locks, the browser tab pauses along with it, so the alarm may not fire on time or at all. Adjust your power settings if you're relying on this over a longer stretch.

Do I need to create an account or download anything?

No, there's nothing to sign up for and nothing to install. Pick a time and a sound, press Start, and it runs entirely in this browser tab.

Can I change the alarm sound?

Yes, there's a short list of tones to choose from before you press Start. Pick whichever one you're most likely to actually hear — softer sounds are easier to sleep through than a firm chime or bell.