Popsugar Celebrity The Royals When Is Queen Elizabeth II's Birthday? Just How Does the Queen Celebrate Her Birthday? April 21, 2017 by Marcia Moody View On One Page Photo 14 of 16 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 14 1944 On her 18th birthday Princess Elizabeth attended a parade of the Grenadier Guards, watched the changing of the guard, and took a salute. Previous Next Start Slideshow The RoyalsQueen Elizabeth IICelebrity FactsThe British Royals