Question: The day Percy Jones was born was the day after what holiday?

Context paragraphs:
Boxing Day: Boxing Day is a holiday celebrated the day after Christmas Day.  It originated in the United Kingdom, and is celebrated in a number of countries that previously formed part of the British Empire.  Boxing Day is on 26 December, although the attached bank holiday or public holiday may take place either on that day or two days later.

Madison Jones: Madison Percy Jones was a novelist born in Nashville, Tennessee, in 1925.  He published almost a dozen novels, and was considered "one of the major figures of contemporary southern letters".

Percy Jones (rugby player): Percy Jones (23 March 1887 – 31 March 1969) was a Welsh international rugby union forward who played club rugby for Pontypool and Newport.  He was awarded eight caps for Wales and faced the touring with South Africans.  Jones was one of the 'Terrible Eight' who clashed with the Irish forwards during the 1914 Five Nations Championship.

Gregory Jones (barrister): Gregory Percy Jones, QC, is an Alderman of the City of London Corporation, where he represents the ward of Farringdon Without. Jones had previously served as a Common Councilman for the same ward from March, 2013 until his election as Alderman in February, 2017.  On both occasions in keeping with City tradition Jones stood as an Independent.

Percy Jones (musician): Percy Jones (born 3 December 1947, near Llandrindod Wells, Wales) is a Welsh bass guitarist, and was a member of jazz fusion band Brand X, from 1974 to 1980, an NYC trio called Stone Tiger (featuring guitarist Bill Frisell and drummers Mike Clark and Dougie Bowne during different periods) in 1982/83, and a reformed version of Brand X which lasted from 1992 to 1999.  Jones was also the driving force behind Tunnels, an improvisation collective which released 4 albums including Progressivity and Live From The Knitting Factory.  Residing in New York, he currently is a member of MJ12, an instrumental group based in NYC.

Stephen Moses: Stephen Moses (born November 29, 1954) is a rock drummer and a trombonist.  He is a founding member of Alice Donut, and also currently plays with MJ-12 with Percy Jones and Rosenbloom.  He has recorded with a number of artists over the years, and has played trombone on five albums by Sour Jazz.

Australian Folk Songs: Australian Folk Songs (Decca DL 8749) is a 1958 album by Burl Ives.  During his visit to Australia in 1952, invited there by the Australia Broadcasting Commission, Ives met the Reverend Percy Jones, a professor of music at the University of Melbourne.  The two men compiled a book of Australian folk songs and Ives recorded an album, "collected and arranged" by Jones, which were later released in the United States and elsewhere as "Australian Folk Songs".

Dick Jones (actor): Richard Percy Jones (February 25, 1927 – July 7, 2014), known as Dick Jones or Dickie Jones, was an American actor and singer who achieved success as a child performer and as a young adult, especially in B-Westerns.  In 1938, he played Artimer "Artie" Peters, nephew of Buck Peters, in the Hopalong Cassidy film, "The Frontiersman".  He may be best known as the voice of Pinocchio in the 1940 second Walt Disney film of the same name.

Brand X: Brand X is a jazz fusion band, originally active between 1975–1980 and 1992–1999.  Noted members included John Goodsall (guitar), Percy Jones (bass), Robin Lumley (keyboards), Kenwood Dennard (drums) and Phil Collins (drums).  Goodsall and Jones were the sole constant members throughout the band's existence.  In 2016, Goodsall, Jones and Dennard reunited with new musicians Chris Clark on keyboards and Scott Weinberger on percussion.

Percy Jones (boxer): Rhondda's Percy Jones (26 December 1892 – 25 December 1922) became the first Welshman to win a world boxing title when he took the World Flyweight Championship from Bill Ladbury in 1914.  Appropriately born on Boxing Day, the diminutive Jones also took the British and European Flyweight Championships from Ladbury in the same match.

Supporting paragraphs: Percy Jones (boxer) Boxing Day
Answer: Christmas