Set the alarm clock for 4:59 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 4:57 am Alarm clock for 4:58 am

Going to bed for a 4:59 am alarm

Asleep by 7:44 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:14 pm — 5 full sleep cycles, about 7 hours
Asleep by 10:44 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.

4:59 am across the country

Sydney	4:59 am
Brisbane	4:59 am
Adelaide	4:29 am
Perth	2:59 am
Darwin	4:29 am

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

Online alarm clock for 4:59 am

Waking at 4:59 am for a shift in a 24-hour shop beside an Australian highway leaves little room for drifting back under the doona. The first task is simply to sit up, get oriented and recognise that 5:00 am has arrived. An alarm at this exact minute can separate the last moment of sleep from the start of getting dressed, collecting keys and heading out before the early traffic builds.

At a highway shop, refrigeration units, passing road trains and overnight cleaning can create steady background noise. The alarm volume should be tested against that environment rather than judged in a quiet room, with the phone or computer placed close enough for the signal to stand out. This browser alarm must remain active on an awake system; if it is closed or allowed to sleep, the shift reminder will stay silent. A separate backup alarm is sensible when being late would leave another worker waiting.

Before stepping into the dark at this hour, keeping the screen dim helps avoid a harsh burst of light immediately after waking. Warm display settings and a low brightness level make the time readable without filling the room with glare. Once shoes, keys and work gear are sorted, brighter lighting can wait until it is actually needed for the trip to the shop.

Common questions

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.

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.