Question: On which day is the spokesman of Cambridge Who's who born ?

Context paragraphs:
Jamie Lowther-Pinkerton: Anthony James Moxon Lowther-Pinkerton, LVO, MBE, DL (born 28 September 1960) is Private Secretary to the Duke and Duchess of Cambridge and to Prince Harry, in the Household of the Duke and Duchess of Cambridge and Prince Harry.  He was appointed on 2 May 2005 but resigned as full-time Private Secretary with effect from September 2013, remaining for a single day a week in order to mentor and advise the younger staff who shall have to succeed him.  The Household shares facilities with the larger Household of the Prince of Wales.  Jamie is godfather to Prince George of Cambridge.

Walter Erle (died 1581): Walter Erle (c.1515/20-1581) ("alias" Erley, Erell, etc.) of Colcombe in the parish of Colyton, of Bindon in the parish of Axmouth, both in Devon, and of Charborough in Dorset, England, was a courtier and servant of the Royal Household to two of the wives of King Henry VIII, namely Catherine Howard (beheaded 1542) and Catherine Parr (survived, died 1548), and successively to his son King Edward VI (1547-1553) and two daughters, Queen Mary I (1553-1558) and Queen Elizabeth I (1558-1603) during their successive reigns.  According to Sandon (1983) his popularity as a royal courtier was in part due to his ability as a musician, particularly as a player of the virginal.  He is known to have composed at least one work of church music, namely "Ave Vulnus Lateris" ("Hail, O Wound of the Side"), a short votive antiphon in honour of one of the Five Holy Wounds of Jesus, his authorship of which is recorded in Peterhouse College manuscripts 471–474, held in the Cambridge University Library, comprising four partbooks from a set of five copied late in the reign of King Henry VIII, which contain seventy-two pieces of Latin church music.  As a courtier-musician he well represents the ideal royal courtier described in "The Courtier" by Baldassare Castiglione (d.1529) and also in "The Boke Named The Governour" by Sir Thomas Elyot (d.1546).  Although he was born into a minor gentry family of Devonshire, he founded a dynasty of substantial landed gentry that survives to the present day, his heir (albeit via several female lines) being the Conservative Member of Parliament Richard Grosvenor Plunkett-Ernle-Erle-Drax (born 1958), of Charborough House.

Richard Lenton: Richard Day Lenton (born 1804, Connington, Cambridge; died 9 September 1870, Cambridge) was an English cricketer who was associated with Cambridge Town Club and made his first-class debut in 1828.

Bill Cashmore: Bill Cashmore (born 1961) is an English actor, playwright, director and co-founder of Actors in Industry.  Bill started his acting career in the Cambridge Footlights and went on to have roles in "The Bill", "Casualty", "All Creatures Great and Small", "Fist of Fun" (playing The Man, the Bootleg Bootleg George Harrison, and a particularly memorable turn as The Piemaster), The News Revue and The Day Today.  Bill was a writer and performer for 'Gimme 5', the live ITV children's programme.  He has written several plays with Andy Powrie, including 'Trip of A Lifetime', published by Samuel French, which has been performed around the world.  He has also written and performed a one-man show called "An Everyday Actor" about his experiences in the acting profession.  Bill's play 'Daughter' won best play at the 2016 Ink Festival and transferred to the Pleasance theatre London.  Bill is also a travel writer having written for the Sunday Telegraph and the Spectator.

Alasdair Pollock: Alasdair William Pollock (born 24 October 1993) is an English cricketer, who played first-class cricket for Cambridge MCCU.  A right-arm medium-pacer, Pollock scored 44 not out on his first-class debut, against Essex County Cricket Club, at number 9 in the order, out of a total of just 99.  Pollock played 7 further first class matches between 2013-2015.  Pollock studied at Robinson College, Cambridge where he obtained a BA in geography.  He captained the Cambridge blues cricket team to T20 and four day glory, but was not as successful in the one day format.

Godfrey Day: Day was born into an ecclesiastical family; his father was Maurice Day, later Bishop of Clogher.  Educated at Oakham School and Pembroke College, Cambridge (whence he gained his Cambridge Master of Arts (MA Cantab)), he was ordained in 1897.  He was a Missionary for the Cambridge Mission to Delhi until 1909 when he became Vicar of St Ann’s Church, Dublin (1913–21).  He became Bishop of Ossory, Ferns and Leighlin in 1920, holding the post for 18 years.  In 1938 he was elected Archbishop of Armagh but died within two months of taking office, having at some point become a Doctor of Divinity (DD).

Donald Trump Jr.: Donald John Trump Jr. (born December 31, 1977) is an American businessman and former reality TV personality.  He is the oldest child of the 45th President of the United States, Donald Trump, and his first wife, Ivana.

Cambridge Who's Who: Cambridge Who's Who is a vanity publisher which describes itself as highlighting people's professional careers by publishing encapsulated biographies.  For additional payment, the publisher also provides other promotional services such as press releases, videos, and Executive of the Year awards.  The company is located in Uniondale, New York.  As of 2010, Donald Trump Jr. was spokesman and “executive director of global branding” of the company.  As of November 2016 the business was "not accredited" by the Better Business Bureau of Metropolitan New York, Long Island, and the Mid-Hudson Region.

Ottoline Leyser: Dame Henrietta Miriam Ottoline Leyser Day {'1': ", '2': ", '3': ", '4': "} (born 7 March 1965), known as Ottoline Leyser, is a British plant biologist and Professor of Plant Development at the University of Cambridge and director of the Sainsbury Laboratory, Cambridge.

Alfred Diver: Alfred John Day Diver (born 6 July 1823 in Cambridge; died 25 March 1876 in Rugby) was an English first-class cricketer whose career spanned the 1843 season to the 1866 season.  Diver played mainly for Cambridge Town Club ("aka" Cambridgeshire) and also played for Middlesex and Nottinghamshire.

Supporting paragraphs: Cambridge Who's Who Donald Trump Jr.
Answer: December 31, 1977