Set the alarm clock for 4:00 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 4:01 amAlarm clock for 4:02 am
All alarms from 4:00 am to 4:59 am →

Going to bed for a 4:00 am alarm

  • Asleep by 6:45 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 8:15 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 9:45 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.

Related tools

Online timerOnline stopwatchCountdownDate calculatorsCalendar and datesPublic holidaysAll tools →

Online alarm clock for 4:00 am

Finish what you are doing and head out for the urgent volunteer fire brigade call, knowing the alarm has marked 4:00 am exactly. At this hour, keep the departure simple: take the gear you set aside, check that you have your keys and phone, and follow your brigade’s usual response procedure.

Because you are leaving immediately, treat this browser alarm as a prompt for the moment rather than something that will keep working after you go. Once the browser is closed, the alarm cannot sound, so it cannot serve as a backup for a later volunteer brigade call. Leave the page running with the sound enabled until you have acknowledged the alert, then rely on the brigade’s established paging or phone system while away.

Moving from a dark house into a vehicle at 4:00 am can make small tasks slower. Before bed, leave a low hallway light ready, place a torch beside your keys, and keep the route to the door clear. Use enough light to identify clothing and equipment without flooding the whole room, especially if others are asleep. If the ute is parked outside, have its interior light setting sorted beforehand so you can get settled without searching for switches in the dark.