Question: What musician was Joe Glaser involved with that was nicknamed "Lady Day"
Context: The Synod of Worcester (26 July 1240) was conducted at Worcester, England, by its bishop, Walter de Cantilupe.  The diocesan synod was held in his cathedral.  A number of statutes were settled regarding godparents, the life of the clergy and lay people.  Among these were that godparents must be three in number, that games of religious mockery were prohibited, and that Lady Day—the Feast of the Annunciation of the Incarnation to the Virgin Mary—should be a day of rest with no servile work demanded or performed.  Also forbidden to clergy was the playing of chess. Eleanora Fagan (April 7, 1915 – July 17, 1959), professionally known as Billie Holiday, was an American jazz musician and singer-songwriter with a career spanning nearly thirty years.  Nicknamed "Lady Day" by her friend and music partner Lester Young, Holiday had a seminal influence on jazz music and pop singing.  Her vocal style, strongly inspired by jazz instrumentalists, pioneered a new way of manipulating phrasing and tempo.  She was known for her vocal delivery and improvisational skills, which made up for her limited range and lack of formal music education.  There were other jazz singers with comparable talent, but Holiday had a voice that captured the attention of her audience. Gardenias for Lady Day is the eighth album by saxophonist James Carter featuring tracks associated with Billie Holiday which was released on the Columbia label in 2003. Neon Joe, Werewolf Hunter is an American television series that originally ran as a five episode mini-series on Adult Swim, created by and starring Jon Glaser.  The series originally aired consecutively each night between December 7, 2015 and December 11, 2015.  Produced by PFFR, the same production company used for Glaser's other projects "Delocated" and "Jon Glaser Loves Gear".  The first season was filmed in and around Palisades, New York. Ernst Simon Glaser (born 1975 in Ålesund, Norway) is a Norwegian musician (cello) and music teacher, the son of violinist Ernst Glaser (1904–79), and brother of the pianist Liv Glaser (1935–). In the western liturgical year, Lady Day is the traditional name in some English speaking countries of the Feast of the Annunciation (25 March), known in the 1549 Prayer Book of Edward VI and the 1667 Book of Common Prayer as "The Annunciation of the (Blessed) Virgin Mary" but more accurately (as currently in the 1997 Calendar of the Church of England) termed "The Annunciation of our Lord to the Blessed Virgin Mary".  It is the first of the four traditional English quarter days.  The "Lady" is the Virgin Mary.  The term derives from Middle English, when some nouns lost their genitive inflections.  "Lady" would later gain an -s genitive ending, and therefore the name means "Lady's day". Joseph G. "Joe" Glaser (December 17, 1896 – June 6, 1969) was an artist manager famous for his involvement in the careers of jazz musicians, including Louis Armstrong and Billie Holiday. Paul Quinichette (May 17, 1916 – May 25, 1983) was an American jazz musician who played the tenor saxophone.  He was known as the "Vice President" or "Vice Prez" for his uncanny emulation of the breathy style of Lester Young, known as "Prez".  Young, who affectionately called everyone "Lady ****" (he called Billie Holiday "Lady Day"), called him "Lady Q".  He was also capable of a gruffer style on his own. The Feast of the Annunciation, contemporarily the Solemnity of the Annunciation, also known as Lady Day, the Feast of the Incarnation ("Festum Incarnationis "), Conceptio Christi ("Christ’s Conception "), commemorates the visit of the archangel Gabriel to the Virgin Mary, during which he informed her that she would be the mother of Jesus Christ, the Son of God.  It is celebrated on 25 March each year. Ministers' money was a tax payable by householders in certain towns in Ireland to fund the local Church of Ireland minister.  It was introduced in 1665, modified in 1827, and abolished in 1857.  The towns affected were Dublin, Cork, Limerick, Waterford, Drogheda, Kilkenny, Clonmel, and Kinsale.  It was levied as a rate of up to one shilling in the pound (i.e. 5%) on the property's rateable value.  The valuation, to a maximum of £60, was done by commissioners appointed by the Lord Lieutenant.  Churchwardens appointed by the local minister collected ministers' money on the quarter days: Christmas, Lady Day, St John's Day, and Michaelmas.  A 1723 act provided that, in Dublin, the same valuation could be used both for ministers' money and for calculating cess, a separate local rate used for public works and poor relief.  Thereafter, cess rates were often expressed in terms of pence per shilling of minister's money.
Answer: Billie Holiday