Question: When was the King of England died based on who's conflict with his wife Philippa of Hainault The Six of Calais is a one-act play was made?

Context paragraphs:
Edward III of England: Edward III (13 November 1312 – 21 June 1377) was King of England from 25 January 1327 until his death; he is noted for his military success and for restoring royal authority after the disastrous and unorthodox reign of his father, Edward II.  Edward III transformed the Kingdom of England into one of the most formidable military powers in Europe.  His long reign of 50 years was the second longest in medieval England and saw vital developments in legislation and government—in particular the evolution of the English parliament—as well as the ravages of the Black Death.

Landscape (play): Landscape is a one-act play by Harold Pinter that was first broadcast on radio in 1968 and first performed on stage in 1969.  The play shows the difficulties of communication between two people in a marriage.  This is illustrated through the two characters who appear to be talking to one another though neither seems to hear the other.  The dialogue resembles two independent monologues.  The play is often studied, read, and performed alongside "Silence", another one-act play published soon after "Landscape".  Both plays mark a change in Pinter's style, with echoes of the work of Samuel Beckett.  In both plays nothing happens, the action of the plays is brought to a halt putting an added emphasis on the role of the dialogues and monologues that take place.  As one critic put it "nothing happens but much is explored".

Isabella of Portugal, Duchess of Burgundy: Isabella of Portugal (22 February 1397 – 17 December 1471) was Duchess of Burgundy as the third wife of Duke Philip the Good.  Born a Portuguese "infanta" of the House of Aviz, Isabella was the only surviving daughter of King John I of Portugal and his wife Philippa of Lancaster.  Her son by Philip was Charles the Bold, the last Valois Duke of Burgundy.  Isabella was the regent of the Burgundian Low Countries during the absence of her spouse in 1432 and in 1441–1443.  She served as her husband's representative in negotiations with England regarding trade relations in 1439 and those with the rebellious cities of Holland in 1444.

Philippa of Luxembourg: Philippa of Luxembourg (1252 – 6 April 1311) was the daughter of Count Henry V of Luxembourg and his wife, Marguerite of Bar.  She married John II, Count of Holland.  Two of her granddaughters were Philippa of Hainault, Queen consort of England, and Margaret II, Countess of Hainault in her own right and wife of Holy Roman Emperor Louis IV.

Karnabharam: Karnabharam or "The Anguish of Karna" (literally: "The Burden of Karna") is a Sanskrit one-act play written by the Indian dramatist Bhasa, an Indian playwright complimented even by the famous Kalidasa in the beginning of his play Malavikagnimitram .  The play describes the mental pain of Karna on the previous day of the Kurukshetra War.  Karnabharam is essentially the retelling of an episode of the Indian epic Mahabharata but the story is presented in a different perspective in the play.  It is perhaps the only potential tragedy in the classic Sanskrit literature, presented in a form that comes closest to the "Vyayoga" (Sanskrit: व्यायोग) form of one-act play.  That is so perhaps because the Natya Shastra ordains the playwrights to create plays for recreation, and essentially create happy endings .  In Karnabharam, the tragedy does not occur on-stage (Unlike Urubhanga, a tragedy that shows Duryodhana dying - again, written by Bhasa).  Karnabharam shows the valiant, generous, righteous Karna riding out towards the battle-ground, where his death under heart-wrenching circumstances is certain.  The basic plot of this play is inspired by Mahabharata.

The Six of Calais: The Six of Calais is a one-act play by George Bernard Shaw.  It was inspired by Auguste Rodin's sculpture "The Burghers of Calais".  It is a historical comedy about the conflict between Edward III of England and his wife Philippa of Hainault over his plans to punish the leading citizens of Calais for resisting the 1346 siege.

Issue of Edward III of England: King Edward III of England is the ancestor of many European monarchs (as well as the issue of many English Dukes, Earls and Viscounts) through his sons Lionel of Antwerp, 1st Duke of Clarence; John of Gaunt, 1st Duke of Lancaster; Edmund of Langley, 1st Duke of York and Thomas of Woodstock, 1st Duke of Gloucester.  All of Edward's legitimate children were by his wife Philippa of Hainault.

Matilda of Brabant, Countess of Holland: Mathilde (c. 1200 – 22 December 1267) was the fourth child and daughter of Mathilde of Flanders and Henry I, Duke of Brabant.  She married Henry II, Count Palatine of the Rhine (died 1214) in Aachen in 1212 and later married Floris IV, Count of Holland on 6 December 1224.  Mathilde was a great-great-grandmother of Philippa of Hainault, wife of King Edward III of England and Queen consort, as well as being a great-granddaughter of King Stephen of England.

Joanna of Hainaut: Joanna of Hainault (1315–1374) was the third daughter of William I, Count of Hainaut, and Joanna of Valois.  She was a younger sister of Philippa of Hainault, Queen of England, and Margaret II of Hainault.  She was the Duchess of Jülich by marriage.

One-act play: A one-act play is a play that has only one act, as distinct from plays that occur over several acts.  One-act plays may consist of one or more scenes.  In recent years, the 10-minute play has emerged as a popular subgenre of the one-act play, especially in writing competitions.  The origin of the one-act play may be traced to the very beginning of drama: in ancient Greece, "Cyclops", a satyr play by Euripides, is an early example.

Supporting paragraphs: The Six of Calais Edward III of England
Answer: 21 June 1377