There are 13 hours between 1 PM and midnight.
11 hours.
16 = 11 + 5 1pm to midnight is 11 hours (12 - 11 = 1) then midnight to 5am is 5 hours
1pm
From 8PM to 1PM (the next day) is 17 hours.
14 whole days from Jan 31 midnight (start of day) to Feb 14 midnight (start of day), plus 13 hours to 1PM so, 14*24*60 + 13*60 = 20940 minutes
2 hours
3 hours
6 hours
5 hours.
6 hours
AM = the hours of usual sleep and wake. 1am to 12am. PM = The hours of afternoon, evening, and sleep. 1pm to 12pm, or midnight.
18 hours 1pm to midnight = 24-13 = 11 hours Midnight to 7am = 7 hours 11 + 7 = 18
Four hours exactly !