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

Donald Trump tweets for the first time

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

Trump begins his term in office