Set the alarm clock for 4:16 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 4:16 am alarm

  • Asleep by 7:01 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 8:31 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 10:01 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.

4:16 am across the country

Sydney4:16 am
Brisbane4:16 am
Adelaide3:46 am
Perth2:16 am
Darwin3:46 am

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

Online alarm clock for 4:16 am

Waking at 4:16 am gives you a quiet moment to get oriented before preparing the café for its 5:00 am opening. You have not started the morning’s work yet, so the alarm marks the point for getting out of bed, checking what you need and moving without turning the start of the day into a rush.

For a café opening before dawn, the signal needs to be audible over whatever is already happening around you. The chosen alarm volume should be tested against a fan, air conditioner or music rather than judged in silence, because steady background noise can mask it. This browser alarm cannot wake inactive software or hardware, so the café opening gets no signal if either has shut down overnight; a separate alarm provides sensible cover.

Before the café doors open, the trip there deserves a realistic share of the schedule. Roads may be quiet at this hour, but overnight roadworks, a missed turn or time spent parking can still absorb the margin. Allow for the actual route rather than assuming empty streets make every journey quick, and keep keys, apron and anything being carried near the door so departure does not slip.

Common questions

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.

What happens once the alarm goes off?

It rings through your device's speakers on a loop until you stop it from this page. There's no separate app notification, so make sure your volume is turned up before you rely on it.

Is this alarm accurate across daylight saving time?

It uses your device's local clock, so as long as your computer's time and date settings are correct, it'll adjust automatically when daylight saving time starts or ends.