This timeline shows when people joined Twitter and contextualizes various milestones for number of followers and posts.
First Tweet is sent
March 21, 2006
Jack Dorsey, the co-founder of Twitter, sends the first ever Tweet: “just setting up my twttr” Source: https://www.lifewire.com/history-of-twitter-3288854
Donald Trump tweets for the first time
May 4, 2009
It was to promote an appearance on Letterman.
Donald Trump wins the 2016 presidential election
November 9, 2016
Trump begins his term in office
January 20, 2017