Set the alarm clock for 4:57 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 4:55 am Alarm clock for 4:56 am Alarm clock for 4:58 am Alarm clock for 4:59 am

Going to bed for a 4:57 am alarm

Asleep by 7:42 pm — 6 full sleep cycles, about 9 hours
Asleep by 9:12 pm — 5 full sleep cycles, about 7 hours
Asleep by 10:42 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.

4:57 am across the country

Sydney	4:57 am
Brisbane	4:57 am
Adelaide	4:27 am
Perth	2:57 am
Darwin	4:27 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 4:57 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 4:57 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.

A browser alarm like this one is handy when your phone's on silent, charging in another room, or you just don't want to unlock it and get pulled into notifications. The trade-off is honesty: it only rings while this tab stays open, so it's not a replacement for your phone alarm on a trip where the laptop lid might close. On a 24-hour clock 4:57 am is written 04:57, and spoken aloud it's three minutes to five in the morning. You'll also see it written 4.57 am — a full stop instead of the colon means the same time. Set an alarm for 4:57 am, set the alarm to 4:57 am, set my alarm for 4:57 am — all of it lands on this page and does the same thing.

Common questions

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.

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.