1966 AD was the 20th century (1900-1999).
20th century
1866 was in the 19th century. 1966 was in the 20th century. 2066 will be in the 21st century.
It is the 18th century AD.
The first century AD.
The 1st century AD.
It is the first century AD.
1st century AD
The 1st century AD.
The 3rd Century AD.
It is the second century AD.
It is the first century AD.
The first century AD.