The 24 Ordinal Hours
We know that there are 24 hours in a day; there is also day and night; the zenith is the borderline of the meridiem; meridiem is another word for meridian; there is Ante Meridiem and Post Meridiem; Ante Meridiem (before Meridian) starts exactly at midnight and lasts until midday; the abbreviation used is am; Post Meridiem (after Meridian) starts exactly at midday and lasts until midnight; the abbreviation used is pm; in timing, we use ordinal numbers following the word hour; here are the 24 ordinal hours and its time (please note that there is no such thing as the 0th hour):
1st hour: 12:00 am – 1:00 am;
2nd hour: 1:00 am – 2:00 am;
3rd hour: 2:00 am – 3:00 am;
4th hour: 3:00 am – 4:00 am;
5th hour: 4:00 am – 5:00 am;
6th hour: 5:00 am – 6:00 am;
7th hour: 6:00 am – 7:00 am;
8th hour: 7:00 am – 8:00 am;
9th hour: 8:00 am – 9:00 am;
10th hour: 9:00 am – 10:00 am;
11th hour: 10:00 am – 11:00 am;
12th hour: 11:00 am – 12:00 pm;
13th hour: 12:00 pm – 1:00 pm;
14th hour: 1:00 pm – 2:00 pm;
15th hour: 2:00 pm – 3:00 pm;
16th hour: 3:00 pm – 4:00 pm;
17th hour: 4:00 pm – 5:00 pm;
18th hour: 5:00 pm – 6:00 pm;
19th hour: 6:00 pm – 7:00 pm;
20th hour: 7:00 pm – 8:00 pm;
21st hour: 8:00 pm – 9:00 pm;
22nd hour: 9:00 pm – 10:00 pm;
23rd hour: 10:00 pm – 11:00 pm;
24th hour 11:00 pm – 12:00 am;
Optionally, we can use quarter hours by the following: quarter an hour, half an hour, or three-quarters of an hour; let us use the following words: A quarter-hour in the 11th hour; it is converted as 10:15 am; a half an hour in the 13th hour is 12:30 pm; three quarters an hour during the 16th hour is 3:45 pm; be careful with this one: a quarter-hour before the 9th hour is 8:45 am; especially, three quarters an hour before the 22nd hour is 8:15 pm; that is all.