the first century before christ was born would be 1 to 100
the second 101 to 200
the third 201 to 300
the fourth 301 to 400
the fifth 401 to 500
the sixth 501 to 600
the seventh 601 to 700
the eighth 701 to 800.
our current year is 2014.
we are in the 21st century after christ was born.
the first century after christ was born was 1 to 100
the second century was 102 to 200
etc.........
the twenty first century is 2001 to 2100.
