Set an alarm for 15:59

⏰ The alarm will ring at 3:59 PM — in 13 h 57 min
Alarm at 3:59 PM
⏰ 3:59 PM
13Hours
:
57Minutes
:
12Seconds
Saturday, October 24, 2026

Set an alarm for another time

Best bedtimes to wake up at 3:59 PM

Go to bed atSleep cyclesSleep
6:44 AM69 h
8:14 AM57 h 30 min
9:44 AM46 h
11:14 AM34 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 3:59 PM alarm

Snooze length1st2nd3rd
5 minutes4:04 PM4:09 PM4:14 PM
9 minutes4:08 PM4:17 PM4:26 PM
10 minutes4:09 PM4:19 PM4:29 PM

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

About 3:59 PM

In the 3 PM hour many schools finish for the day and afternoon traffic starts to grow.

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

About 3:59 PM

12-hour clock3:59 PM
24-hour clock15:59
Military time1559
In wordsOne minute to four
Part of the dayAfternoon

Questions about a 15:59 alarm

How do I set an alarm for 15:59?

Open this page, press “Start Alarm” and leave the tab open. The alarm rings at 3:59 PM, which is 13 hours, 57 minutes from now.

What time should I go to bed to wake up at 3:59 PM?

For five full sleep cycles, go to bed around 8:14 AM; for six cycles, around 6:44 AM.