The 201st Decade, known as "The Aughts", ended last night.

• The "Twentieth Century" ran from Jan 1901 through Dec 2000.
• The "Nineteen Hundreds" ran from Jan 1900 through Dec 1999.
• The "Nineties" ran from Jan 1990 through Dec 1999.
• The first "decade" only contained nine years, making it an "enneade".

Some people say that the current decade should be called "The Teens". I think we should only call it that if we pronounce the first few years as "Twenty Teen", "Twenty Oneteen", and "Twenty Twoteen".