No, there is no hyphen in "twenty-first century." When used as an adjective, it is written as "twenty-first," but when referring to the era as a noun, it is simply "twenty-first century" without a hyphen between "twenty" and "first."
There should be a hyphen in twenty-three.
nope, twenty-first century is fine
the twenty first century beginned in 2000 because the twenty first century ends in 2100 actully
Twenty First Century Skinned was created in 1999.
No—you generally do not capitalize “twenty-first century.” Use lowercase in normal sentences: We are living in the twenty-first century. Capitalize only in these cases: At the beginning of a sentence Twenty-first century technology is evolving rapidly. In titles or headings (title case) The Impact of the Twenty-First Century on Architecture So, in standard usage: twenty-first century (lowercase) is correct.
21st is usually hyphenated when spelt. Dictionaries list it as 'twenty-first'. However, as a book/article title, or in company names, it is sometimes written as Twenty First ... as in 'Twenty First Century Poets', but, as this could be interpreted as meaning a book about 1st century poets, a hyphen would remove any ambiguity e.g. written as 'Twenty-first Century Poets' or 'Twenty-First Century Poets' (unless, of course, the book is actually about 1st century poets, in which case a better title would be 'Twenty First-Century Poets'!)
Life in the Twenty-First Century was created in 1960.
Yes. It should be----- Twenty-first Century Skills
Yes, I think it does.
Twenty first
twenty-first century
The twenty-first century started in the year 2001. As there was no "year 0" the last year of the 20th century (set of 100 years) was 2000.