The similarities between the 20th and 21st centuries lie in innovations. The 20th and 21st centuries have been periods of great strides in technology and other areas.
Chat with our AI personalities
The end of British rule in the Indian sub continent and the emergence of India and Pakistan as independent states was the most important event in this part of the region in the 20th century.
The purpose of the 20th amendment was to deal with the repeal of prohibition and the 21st amendment focused on limits on presidential terms.
21st century
21st. century
The current century is the 21st: 2001 to 3000 inclusive. The 20th century was 1901 to 2000 inclusive The 19th century was 1801 to 1900 inclusive The 18th century was 1701 to 1800 inclusive The 17th century was 1601 to 1700 incusive . . . . and so on to: The 1st century was 1 to 100 inclusive The 1st century BC was 1 to 100 BC The 2nd century BC was 101 to 200 BC . . . and so on back for millions of years to the creation of the planet.