a “Millennial” is on 17 years old.
[The term Millennials is usually considered to apply to individuals who reached adulthood around the turn of the 21st century. The precise delineation varies from one source to another, however. Neil Howe and William Strauss, authors of the 1991 book Generations: The History of America’s Future, 1584 to 2069, are often credited with coining the term. Howe and Strauss define the Millennial cohort as consisting of individuals born between 1982 and 2004.
Other proposed dates for Millennials:
According to Iconoclast, a consumer research firm, the first Millennials were born in 1978.
Newsweek magazine reported that the Millennial generation was born between 1977 and 1994.
In separate articles, the New York Times pegged the Millennials at 1976-1990 and 1978-1998.
A Time magazine article placed the Millennials at 1980-2000.
]
—http://whatis.techtarget.com/definition/millennials-millennial-generation