In the 21st century, somebody or something has changed the rules about how our world works.

The 21st century simply means open century.

'The New World Haggadah' is meant for American Jews in the 21st century.

The great challenge of the twenty-first century is to raise people everywhere to a decent standard of living while preserving as much of the rest of life as possible.

Opinions are 10 a penny. In the spin-driven, PR-controlled world of the 21st century, hard facts are rare indeed.

It's important to move the theatre into the 21st Century.