Set the alarm clock for 3:52 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 3:52 am alarm

  • Asleep by 6:37 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 8:07 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 9:37 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.

3:52 am across the country

Sydney3:52 am
Brisbane3:52 am
Adelaide3:22 am
Perth1:52 am
Darwin3:22 am

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

Online alarm clock for 3:52 am

You’re midway through another job when a night delivery needs to be collected, so a 3:52 am alarm gives you a clear point to break away. It leaves a small buffer before 4:00 am to put down what you are doing, check the driver’s message and reach the front door or apartment entrance without a frantic last-minute dash.

Because the alert is set well before dawn, the phone or laptop may dim and fall asleep while you continue with your task. Keep it awake, leave this browser page open and confirm that the sound is audible at your current volume. If you close the page or the device sleeps before 3:52 am, no alarm will sound and the delivery collection could be missed.

Other people in the house may be asleep when the driver arrives, so place the device close enough to hear without sending a loud tone through every room. A moderate signal followed by vibration can reduce the disturbance, while keys, shoes and any entry instructions prepared near the door help you move quietly. At this hour, avoid bright hallway lights where a phone torch aimed at the floor will do.

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.