Question: when do you have to be born to be a millenial

title: Millennials
text: Bernie Sanders , a self - proclaimed democratic socialist and democratic candidate in the 2016 United States presidential election , was the most popular candidate among Millennial voters in the primary phase , having garnered more votes from people under 30 in 21 states than the major parties ' candidates , Donald Trump and Hillary Clinton , did combined . In April 2016 , The Washington Post viewed him as changing the way millennials viewed politics , saying , `` He 's not moving a party to the left . He 's moving a generation to the left . '' Bernie Sanders referred to millennials as `` the least prejudiced generation in the history of the United States '' . A 2014 poll for the libertarian Reason magazine suggested that American millennials were social liberals and fiscal centrists , more often than their global peers . The magazine predicted that millennials would become more conservative on fiscal issues once they started paying taxes .