Depends on who's calender you are looking at. Jewish calender says it is the 58th century Chinese calender goes a few years deeper, The Roman calender most of us use is the 21st century. The first century on our calender started on year 1 and ended at midnight of the year 99. 100th year on our calender was the beginning of the 2nd century, It ended on midnight of the year 299. Then the third century started.
21st. (Though Vice president of the US, Joe Biden recently gaffed that we're in the 20th century)
21st
