Question: What holiday features the song composed by the man known for doing "Virtual Choir" projects, known as "Light and Gold"?

Context articles: Lux Aurumque
Herbstlied, WAB 73
Das edle Herz, WAB 66
Orlando Gough
Trav'lin' Light (song)
National Day (Singapore)
St Winifred's School Choir
Eric Whitacre
The Christmas Choir
Yu Kanda

Lux Aurumque ("Light and Gold", sometimes "Light of Gold") is a choral composition in one movement by Eric Whitacre.
 It is a Christmas piece based on a Latin poem of the same name, which translates as "Light, warm and heavy as pure gold, and the angels sing softly to the new born baby".
 In 2000, Whitacre set a short Latin text for mixed choir a cappella.
 In 2005, he wrote an arrangement for wind ensemble.
 The choral version became known through Whitacre's project Virtual Choir in 2009.
 The piece is also available for men's choir.
 A performance takes about four minutes.
Herbstlied (Autumn song), WAB 73, is a romantic song composed by Anton Bruckner in 1864.
 The song, scored for men's choir and two soprano soloists, figures an autumn walking with nightingale song.
Das edle Herz ("The noble heart"), WAB 66, is a song composed by Anton Bruckner in December 1857 during his stay in Linz.
 During his stay in St. Florian, Bruckner had already composed a first setting of the song for men's choir, WAB 65.
Orlando Gough ( ; born 1953, Brighton, Sussex) is a British composer, educated at Oxford, and noted for projects written for ballet, contemporary dance and theatre.
 Collaborators have included Siobhan Davies, Alain Platel, Shobana Jeyasingh and Ashley Page of The Royal Ballet.
 He is artistic director of The Shout, which he founded in 1998 with Richard Chew.
 The choir won the Time Out Award for Classical Artist of the Year in 2001.
 He released one album titled "Message from the Border" that was released on Catalyst/BMG Records.
 His 2001 commission from Fretwork, called 'Birds on Fire' was recorded by them for Harmonia Mundi under the same title and was released in 2008.
 He composed the music for the closing ceremony of the 2008 European Capital of Culture, Stavanger.
 Members of the choir include Carol Grimes, Melanie Pappenheim and Manickam Yogeswaran.
 In 2010 the Turner Contemporary commissioned Gough to compose a work for its opening ceremonies: "The Red Volcano" - for community choir and orchestra, had its World Premiere in April 2011 conducted by Anthony Castro.
"Trav'lin' Light" is a 1942 song composed by Trummy Young and Jimmy Mundy with lyrics by Johnny Mercer.
 In 1942, with vocals by Billie Holiday, Paul Whiteman hit number one on the Harlem Hit Parade charts for three non consecutive weeks.
 The song also hit the pop charts at number 23 for one week.
 The Paul Whiteman release lists Billie Holiday as "Lady Day".
 The trombone is played by Skip Layton.
 The recording was also re-released as a V-Disc in October, 1944 by the U.S. War Department for shipment overseas for military personnel as 286A under the "Blues" category.
The National Day of Singapore is celebrated every year on August 9, in commemoration of the Singapore's independence from Malaysia in the year 1965.
 This holiday features a National Day Parade, an address by the Prime Minister of Singapore, and fireworks celebrations.
St Winifred's School Choir, from St Winifred's Roman Catholic Primary School in Stockport, England, was a choir of children whose single in 1980 became that year's British Christmas number one single.
 Entitled "There's No One Quite Like Grandma", written for the 80th birthday of Queen Elizabeth, the Queen Mother in 1980 by Gordon Lorenz, it became that year's British Christmas number one single.
 It sold one million copies, most of them Christmas presents from grandchildren.
 It spent two weeks at number one, and 11 weeks in the UK Singles Chart in total.
 Dawn Ralph provided the lead vocal of the song composed by award-winning record producer Gordon Lorenz.
 During the late 1970s and the 1980s, Miss Terri Foley trained and conducted the choir, who gave the Music for Pleasure record label its only UK No. 1 single.
Eric Edward Whitacre (born January2, 1970) is a Grammy-winning American composer, conductor, and speaker, known for his choral, orchestral and wind ensemble music.
 He is also known for his "Virtual Choir" projects, bringing individual voices from around the globe together into an online choir.
 In March2016, he was appointed as Los Angeles Master Chorale's first artist-in-residence at the Walt Disney Concert Hall.
The Christmas Choir is a 2008 made for television holiday film written by Donald Martin and directed by Peter Svatek, It is based upon a true story of a man who volunteered to work at a homeless shelter and started a choir with its residents.
 The film first aired in December 2008 on the Hallmark Channel.
 The film was Michael Sarrazin's final screen role.
 It was inspired by the true story of Pierre Anthian and the Montreal Accrual Bonneau Choir.
Yu Kanda (Japanese: 神田ユウ , Hepburn: Kanda Yū ) is a character from "D.Gray-man", a manga series created by Japanese artist and writer Katsura Hoshino.
 Kanda is a young adult who is an exorcist from an organization known as the Black Order.
 Like the other exorcists in the order, he is in charge of destroying demonic enemies known as Akuma, created by a man known as the Millennium Earl.
 For this, he uses an object referred to as "Innocence" sealed within a Japanese sword.
 Kanda sides with the Black Order in their fight against the Earl's group, the Noah Family.
 Kanda is often cold and antisocial toward his allies, even disliking it when people refer to him by his given name, Yu.
 He often engages in fights with his frequent ally, the series' protagonist Allen Walker.
 As the series proceeds, it is revealed he is the result of an experiment from the Black Order that created his artificial body and merged it with the brain of a deceased exorcist.
 Outside the main series and the two anime adaptations, Kanda has also appeared in the "D.Gray-man" light novels, the two video games of the series, and the crossover game "Jump Ultimate Stars".