How do you abbreviate 20th century?
The Chicago Manual of Style holds that the century should be spelled out (twentieth, not 20th) and that century not be capitalized.
How do you write mid 20th century?
The hyphenated form lends itself better to compound modifiers, as in mid-twentieth-century furniture. So when the less common noun phrase is used, we prefer to retain the hyphen: mid-twentieth century. A similar logic has discouraged us from advising midtwentieth centurythough we do recommend midcentury.
Why do we say 21st century instead of 20th?
We live in the 21st Century, that is, the 2000s. Similarly when we say “20th Century,” we are referring to the 1900s. All this because, according to the calendar we use, the 1st Century included the years 1-100 (there was no year zero), and the 2nd Century, the years 101-200.
Who was born on the year 1?
A monk called Dionysius Exiguus (early sixth century A.D.) invented the dating system most widely used in the Western world. For Dionysius, the birth of Christ represented Year One. He believed that this occurred 753 years after the foundation of Rome.
Who started Year 1?
There is no year zero in this scheme, so the year AD 1 immediately follows the year 1 BC. This dating system was devised in 525 by Dionysius Exiguus of Scythia Minor but was not widely used until after 800. The Gregorian calendar is the most widely used calendar in the world today.