
For example, write “the nineties,” but “the Gay Nineties” The same rule about capitalization applies to decades as to centuries: if the decade is part of a proper name or title, it will be capitalized otherwise leave it in lowercase. NOTE: There’s no apostrophe between the numerals and the letter s. Newspaper headline writers may also exercise freedom when writing the century: New Year Rings in 21st Centuryīottom line: go with twenty-first century unless there is some reason not to–for example, contrary guidelines in a style manual you are required to follow.ĭecades may be spelled out or expressed in numerals:

Twenty-First-Century Gateways (In this book title the century name has become an adjective.) Someone naming a program, company or a book may express the century any way they wish: When a century is part of a proper name, no hard and fast rule can apply. Unless the name of the century begins a sentence or is part of a proper name, it is written in all lowercase letters: We are living in the twenty-first century. My short answer for all specified contexts is twenty-first century. How would you write “21st Century”? In a legal document? In a business letter? In fiction? In a nonfiction context?

Melvin Merzon sets me this multi-part question:
