Set an alarm for 0:51

⏰ The alarm will ring at 12:51 AM — in 22 h 41 min
Alarm at 12:51 AM
⏰ 12:51 AM
22Hours
:
41Minutes
:
14Seconds
Saturday, October 24, 2026

Set an alarm for another time

Best bedtimes to wake up at 12:51 AM

Go to bed atSleep cyclesSleep
3:36 PM69 h
5:06 PM57 h 30 min
6:36 PM46 h
8:06 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 12:51 AM alarm

Snooze length1st2nd3rd
5 minutes12:56 AM1:01 AM1:06 AM
9 minutes1:00 AM1:09 AM1:18 AM
10 minutes1:01 AM1:11 AM1:21 AM

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

About 12:51 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 12:51 AM

12-hour clock12:51 AM
24-hour clock00:51
Military time0051
In wordsNine minutes to one
Part of the dayNight

Questions about a 0:51 alarm

How do I set an alarm for 0:51?

Open this page, press “Start Alarm” and leave the tab open. The alarm rings at 12:51 AM, which is 22 hours, 41 minutes from now.

What time should I go to bed to wake up at 12:51 AM?

For five full sleep cycles, go to bed around 5:06 PM; for six cycles, around 3:36 PM.