Yes, and 2000 is the 21st century.
20th century
20th
1989 was the 20th century (1900-1999).
1961 was the 20th century (1900-1999).
1931 was the 20th century (1900-1999).
1931 was the 20th century (1900-1999).
1982 was the 20th century (1900-1999).
This was the 20th century (we are now in the 21st century).
the 20th century is also called the Dissonant Period.
1919 was the 20th century (1900-1999).
the 20th century started in 1901. The first full 1900 years (19 centuries) included 1900, because there was no year 0.
1966 AD was the 20th century (1900-1999).