Q: Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
Context: The Battle of Coutras, fought on 20 October 1587, was a major engagement in the French Religious Wars between a Huguenot (Protestant) army under Henry of Navarre (the future Henry IV of France) and a royalist army led by Anne, Duke of Joyeuse. 
 Question: On what date did Battle of Coutras end?
A:
20 october 1587