<div class='timeline-item'><div class='timeline-left'><div class='timeline-date'>1947</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>David Letterman is Born</div><div class='timeline-text'>On April 12, 1947, David Letterman was born in Indianapolis, Indiana.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date'>1975</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Hosts "The Morning Show" on WLWI Radio</div><div class='timeline-text'>Letterman begins hosting his first morning show, "The David Letterman Show", on WLWI Radio in Indianapolis.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date'>1980</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Moves to Los Angeles</div><div class='timeline-text'>Letterman moves to Los Angeles to pursue a career in television.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date'>1982</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Hosts Late Night with David Letterman</div><div class='timeline-text'>Letterman begins hosting Late Night with David Letterman on NBC.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date'>1993</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Switches Networks to CBS</div><div class='timeline-text'>Letterman switches networks and hosts Late Show with David Letterman on CBS.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date'>2015</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Retires After 33 Years on TV</div><div class='timeline-text'>Letterman retires after more than three decades in late night television.</div></div></div><div class='timeline-item'><div class='timeline-left'><div class='timeline-date'>2018</div></div><div class='timeline-center'></div><div class='timeline-right'><div class='timeline-text timeline-text-title'>Receives Mark Twain Prize for Humor</div><div class='timeline-text'>Receives the prestigious Mark Twain Prize for American Humor.</div></div></div>