Which ended on an earlier date in May of its corresponding year, 2010–11 La Liga or 2009–10 La Liga?
2010–11 La Liga:  The campaign began on 28 August 2010 and ended on 21 May 2011. 2009–10 La Liga: The 2009–10 La Liga season (known as the "Liga BBVA" for sponsorship reasons) was the 79th La Liga since its establishment. 2009–10 La Liga:  The campaign began on 29 August 2009 ended on 16 May 2010 due to all top-flight European leagues ending earlier than the previous season because of 2010 FIFA World Cup.
2009–10 La Liga