The 21st century contains the 100 years, starting from January 1, 2001, and ending on December 31st, 2100. However, the commencement of the 21st century was celebrated one year early, that is, on January 1st, 2000, because of the significant change in the digits of the year from 1999 to 2000!
Yes Dear! We are living in the era of 21st Century and it started on January 1st 2001 till December 31st 2100.
2001 - 2099
Yes this is the 21st Century, it started on January 1, 2001. I could be wrong now, but I don't think so ------.