Question: Richard de Clair, 5th Earl of Hertford's wife's father died on what day?

Context paragraphs:
Bogo de Clare: Bogo de Clare (21 July 1248 - October 1294) was the third son of Richard de Clare (1222–1262), 5th Earl of Hertford, 6th Earl of Gloucester.  He held multiple clerical livings, without apparently, having been ordained priest.

Vere Fane, 5th Earl of Westmorland: Vere Fane, 5th Earl of Westmorland (25 May 1678 – 19 May 1698), styled The Honourable Vere Fane between 1678 and 1691 and Lord le Despenser between 1691 and 1693, was a British peer and member of the House of Lords.  He was the second son (but oldest surviving son) of Vere Fane, 4th Earl of Westmorland and his wife Rachel Bence; as well as the older brother of Thomas Fane and John Fane.  When his father died in 1693, Vere Fane inherited the Earldom of Westmorland, as well as his father's further titles Baron Burghersh and Lord le Despenser.  Fane died in 1698 at the age of 19, unmarried and without any issue, and was succeeded by his younger brother Thomas.

Gilbert de Clare, 5th Earl of Gloucester: Gilbert de Clare, 4th Earl of Hertford, 5th Earl of Gloucester, 1st Lord of Glamorgan, 7th Lord of Clare (1180 – 25 October 1230) was the son of Richard de Clare, 3rd Earl of Hertford (c. 1153–1217), from whom he inherited the Clare estates.  He also inherited from his mother, Amice Fitz William, the estates of Gloucester and the honour of St. Hilary, and from Rohese, an ancestor, the moiety of the Giffard estates.  In June 1202, he was entrusted with the lands of Harfleur and Montrevillers.

Eleanor de Clare: Eleanor de Clare, suo jure 6th Lady of Glamorgan (3 October 1292-30 June 1337) was a powerful English noblewoman who married Hugh Despenser the Younger and was a granddaughter of Edward I of England.  With her sisters, Elizabeth de Clare and Margaret de Clare, she inherited her father's estates after the death of her brother, Gilbert de Clare, 8th Earl of Gloucester, 7th Earl of Hereford at the Battle of Bannockburn in 1314.  She was born in 1292 at Caerphilly Castle in Glamorgan, Wales and was the eldest daughter of Gilbert de Clare, 6th Earl of Hertford, 7th Earl of Gloucester, 5th Lord of Glamorgan and Princess Joan of Acre.

Maud de Lacy, Countess of Hertford and Gloucester: Maud de Lacy, (25 January 1223 – 10 March 1289), was an English noblewoman, being the eldest child of John de Lacy, 2nd Earl of Lincoln, and the wife of Richard de Clare, 5th Earl of Hertford, 6th Earl of Gloucester.

Richard de Redvers, 2nd Earl of Devon: Richard de Redvers, 2nd Earl of Devon (died 1162) was Earl of Devon from 1155 until his death and was feudal baron of Plympton in Devon.  He married Denise, one of the daughters and coheiresses of Reginald, Earl of Cornwall.  He was High Sheriff of Devon from 1154–1157.  He was the son of Baldwin de Redvers, 1st Earl of Devon and nephew of William de Reviers, 5th Earl of Devon.

Baldwin de Redvers, 7th Earl of Devon: Baldwin de Redvers, 7th Earl of Devon (1 January 1236 – 1262), feudal baron of Plympton in Devon and Lord of the Isle of Wight, was the son of Baldwin de Redvers, 6th Earl of Devon and Amice de Clare, daughter of Gilbert de Clare, 5th Earl of Hertford.  He succeeded his father at the age of ten.

Gilbert de Clare, 8th Earl of Gloucester: Gilbert de Clare, 8th Earl of Gloucester, 7th Earl of Hertford, 10th Lord of Clare, 5th Lord of Glamorgan (c. 10 May 1291 – 24 June 1314) was an English nobleman and a military commander in the Scottish Wars.  In contrast to most English earls at the time, his main focus lay in the pursuit of war rather than in domestic political strife.  He was the son of Gilbert de Clare, 7th Earl of Gloucester, and Joan of Acre, daughter of Edward I.  The older Gilbert died when his son was only four years old, and the younger Gilbert was invested with his earldoms at the young age of sixteen.  Almost immediately, he became involved in the defence of the northern border, but later he was drawn into the struggles between Edward II and some of his barons.  He was one of the Lords Ordainers who ordered the expulsion of the king's favourite Piers Gaveston in 1311.  When Gaveston was killed on his return in 1312, Gloucester helped negotiate a settlement between the perpetrators and the king.

Richard de Clare, 6th Earl of Gloucester: Richard de Clare, 5th Earl of Hertford, 6th Earl of Gloucester, 2nd Lord of Glamorgan, 8th Lord of Clare (4 August 1222 – 14 July 1262) was son of Gilbert de Clare, 4th Earl of Hertford and Isabel Marshal.  On his father's death, when he became Earl of Gloucester (October 1230), he was entrusted first to the guardianship of Hubert de Burgh.  On Hubert's fall, his guardianship was given to Peter des Roches (c. October 1232); and in 1235 to Gilbert, Earl Marshall.  He was also a powerful Marcher Lord in Wales and inherited the Lordship of Glamorgan upon the death of his father.

John de Lacy, 2nd Earl of Lincoln: John de Lacy (  1192 – 22 July 1240) was the 2nd Earl of Lincoln, of the fourth creation.

Supporting paragraphs: Maud de Lacy, Countess of Hertford and Gloucester John de Lacy, 2nd Earl of Lincoln
Answer: 22 July 1240