Set the alarm clock for 5:17 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 5:15 am Alarm clock for 5:16 am Alarm clock for 5:18 am Alarm clock for 5:19 am

Going to bed for a 5:17 am alarm

Asleep by 8:02 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:32 pm — 5 full sleep cycles, about 7 hours
Asleep by 11:02 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.

5:17 am across the country

Sydney	5:17 am
Brisbane	5:17 am
Adelaide	4:47 am
Perth	3:17 am
Darwin	4:47 am

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

How to use the online alarm clock

If you're still up rather than getting up, setting this for 5:17 am gives you a hard stop. Daylight saving time or not, the sun won't be up yet. It works the same regardless of the season, ringing at 5:17 am sharp through your speakers, so you can finally close the laptop and get some sleep.

Start by selecting a tone from the dropdown, then hit Start to lock it in. From that point the page does the counting, and it'll ring once the time is reached, but only if the tab is still open somewhere on your device. Closing it, or the browser entirely, cancels the alarm.

Compared to a phone, this alarm has one job and nothing else competing for attention — no messages, no app switching. It's free and doesn't ask for sign-up, but it only works while the tab is open and the device stays awake, so it suits daytime use at a desk better than an overnight bedroom alarm. On a 24-hour clock 5:17 am is written 05:17, and spoken aloud it's seventeen minutes past five in the morning. Written the Australian way that's 5.17 am, and typed in a hurry it's often 5:17am. Whether you would say set alarm for 5:17 am or put an alarm on for 5:17 am, the steps are the same: pick a sound, press Start, leave the tab open.

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.