Set the alarm clock for 4:21 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 4:19 amAlarm clock for 4:20 amAlarm clock for 4:22 amAlarm clock for 4:23 am
All alarms from 4:00 am to 4:59 am →

Going to bed for a 4:21 am alarm

  • Asleep by 7:06 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 8:36 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 10:06 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 4:21 am

While you watch the clock for the moment to meet a late-night flight at Auckland Airport, set the alarm for 4:21 am so the wait does not drift past you. That leaves enough time before 5:00 am to check the arrivals update, gather your keys and allow for the drive to the terminal without treating the whole night as one long countdown.

Your airport pickup needs a signal you can hear over a heater, television or other background sound. Turn the volume up to a clearly audible level, keep the browser running and test the alert before settling down. This browser alarm is not a standalone alarm: if the browser closes or the phone falls asleep, the airport reminder may not sound, leaving you late for the flight arrival. For extra assurance, set the phone’s built-in alarm as a backup.

Once the traveller has been collected, protect the sleep still available rather than filling the early hours with small jobs. Prepare a dark, quiet room before leaving, put anything needed for the morning within reach and return to bed soon after the airport run. At 4:21 am, reducing light and unnecessary activity can make the remaining rest easier to use before the day begins.