twenty-first century
2004 is in the twenty-first century.
The 8th Century AD, which is also the 8th Century CE.
The first century CE began at the beginning of 1 CE and ended at the end of 100 CE. The first century BCE ended at the end of 1 BCE, and the second century CE began at the beginning of 101 CE. (Note that there is no year 0, so 1 BCE immediately precedes 1 CE.)
The 13th Century.
The 6th century.
2004 is in the twenty-first century.
The 8th Century AD, which is also the 8th Century CE.
The first century CE began at the beginning of 1 CE and ended at the end of 100 CE. The first century BCE ended at the end of 1 BCE, and the second century CE began at the beginning of 101 CE. (Note that there is no year 0, so 1 BCE immediately precedes 1 CE.)
The 13th Century.
The 6th century.
the first century
In the West, from the 1st Century BCE to the 4th Century CE. In the East until the 15th Century CE.
The country that got its independence in 10th Century CE is Denmark.
the year 1000 AD or CE
1235 CE
The year 81 is in the first century CE.
The 15th century. It was the last year of it.