Set an alarm for 12:20 AM

⏰ The alarm will ring at 12:20 AM — in 23 h 05 min
Alarm at 12:20 AM
⏰ 12:20 AM
23Hours
:
5Minutes
:
47Seconds
Saturday, October 24, 2026

Set an alarm for another time

Best bedtimes to wake up at 12:20 AM

Go to bed atSleep cyclesSleep
3:05 PM69 h
4:35 PM57 h 30 min
6:05 PM46 h
7:35 PM34 h 30 min

Assumes about 15 minutes to fall asleep and sleep cycles of roughly 90 minutes. Cycle length varies from person to person, so treat these as estimates.

Snooze times after a 12:20 AM alarm

Snooze length1st2nd3rd
5 minutes12:25 AM12:30 AM12:35 AM
9 minutes12:29 AM12:38 AM12:47 AM
10 minutes12:30 AM12:40 AM12:50 AM

Nine minutes is the traditional snooze length on many alarm clocks.

About 12:20 AM

Midnight starts a new calendar day. Date-based deadlines, daily counters and many scheduled computer jobs reset during this hour, and most people are asleep.

Press “Start Alarm” and keep this tab open; press “Test Alarm” first to check the volume.

About 12:20 AM

12-hour clock12:20 AM
24-hour clock00:20
Military time0020
In wordsTwenty minutes past midnight
Part of the dayNight

Questions about a 12:20 AM alarm

How do I set an alarm for 12:20 AM?

Open this page, press “Start Alarm” and leave the tab open. The alarm rings at 12:20 AM, which is 23 hours, 5 minutes from now.

What time should I go to bed to wake up at 12:20 AM?

For five full sleep cycles, go to bed around 4:35 PM; for six cycles, around 3:05 PM.