Question: After being left off all of the Beatles' annual Christmas fanclub records, the song "Christmas Time" appeared as a B-side to what "lost" single?

Context articles: Christmas Time Is Here
Christmas Time (Is Here Again)
Christmas Gift (EP)
Ashanti's Christmas
This Christmas Time
Christmas Jollies
Pray (Deen album)
The Beatles' Christmas records
Christmas Time Is in the Air Again
Christmas Time (Backstreet Boys song)

"Christmas Time Is Here" is a popular Christmas song written by Lee Mendelson and Vince Guaraldi for the 1965 TV special "A Charlie Brown Christmas", one of the first animated Christmas specials produced for network TV in the United States.
 Because the song became a hit, two versions were included on the album "A Charlie Brown Christmas": an instrumental version by the Vince Guaraldi Trio and a vocal version by children from St. Paul's Episcopal Church in San Rafael, California.
"Christmas Time (Is Here Again)" (Lennon/McCartney/Harrison/Starkey) is a Christmas song recorded by the Beatles for their 1967 fan club Christmas record.
 After being slated for inclusion in the planned (but ultimately scrapped) "Sessions" compilation album in 1985, the song finally saw official re-release in 1995 on the "Free as a Bird" single (issued in conjunction with the "Anthology" series), for which it was edited from its original 6:17 to a shortened version of 3:03.
 The song opens with a light-hearted tune from all four of the Beatles and occasionally cuts to a tale of the Beatles arriving at the fictional BBC house.
 This part of the song was cut from the 1995 single version.
 The song then closes with a Christmas greeting from all four of the Beatles.
 At the end, "Auld Lang Syne" is played on the organ as Lennon reads one of his original nonsense free verse poems.
Christmas Gift is the first EP by English recording artist Alexandra Burke.
 The extended play was released on 23 December 2012, and was released for Christmas Day.
 Burke gave the EP as a free download to her fans for Christmas.
 The EP only consists of two tracks.
 The EP contains a version "Silent Night", which was hugely popular with Burke's fans as she performed this on the final of "The X Factor" when she was a contestant.
 It also features a new song, "Christmas Time", after Burke previously said she would like to see an original Christmas song take the Christmas number-one spot in the United Kingdom.
 The EP gained positive feedback and critics said the EP was "blooming brilliant" and "amazing" as well as Burke's vocals being on point.
 The EP follows after the release of Burke's second studio album, "Heartbreak on Hold".
 It became her last album with RCA Records before her departure in June 2013.
Ashanti's Christmas is the first Christmas album by American R&B/pop singer Ashanti, released in 2003 (see 2003 in music).
 The album debuted and peaked at #160 on the "Billboard" 200 and #43 on the Top R&B/Hip-Hop Albums chart.
 The album contained almost an equal amount of new songs, written by Ashanti herself, and covers of Christmas classics.
 As for singles, Ashanti released a Christmas Medley which featured the songs "Christmas Time Again", "The Christmas Song", and "Hey Santa".
 A video was shot for the medley and it received moderate rotation on BET and MTV.
 A reworked version of the original song "Time of Year" would later appear on Ashanti's second Christmas album, A Wonderful Christmas with Ashanti.
This Christmas Time is the first Christmas album by the American country music group Lonestar.
 Their first Christmas album, it was released in 2000 on BNA Records.
 Most of the tracks are renditions of traditional Christmas material, with three newly written tracks — the title track, "If Every Day Could Be Christmas", and "Reason for the Season".
Christmas Jollies is the third album released by Vincent Montana Jr. and his first Christmas album.
 It was recorded and released on Salsoul Records.
 The album includes a few new Christmas tunes, co-written by Vincent Montana, Jr. himself, entitled, "There's Someone Who's Knocking At My Door" with the children's chorus singing, "Merry Christmas All" with his daughter, Denise Montana, singing the lead and "Christmas Time" with the sweet honeyed-voices of the session girl-group, The Sweethearts of Sigma that features group members Barbara Ingram, Evette Benton and Carla Benson.
 This highly successful album also includes disco renditions of "The Little Drummer Boy", "Sleigh Ride" and so on, plus the orchestrated instrumental version of "Silent Night".
 Side two is semi-instrumental with two different medleys, such as Christmas Medley with the family chorus singing and New Year's Medley with The Salsoul Singers singing in the background.
Pray is the fifth studio album by Japanese Pop band Deen.
 It was released on 20 November 2002 under Berg label records.
 The album consists of only one previously released single, "Birthday eve ~Dare yori mo Hayai Ai no Uta~" and it's coupling song.
 Bonus track "Christmas Time" appeared only in limited first-press release, this song was originally released in conceptual single "Classics One: White Christmas time".
The Beatles' Christmas records were spoken and musical messages from English rock group The Beatles that were posted out on flexi disc at Christmas time to members of their official fan-clubs in the United Kingdom and the United States.
 One such record was issued each year from 1963 to 1969 and an LP compilation of all seven in 1970.
"Christmas Time is in the Air Again" is a song by American singer and songwriter Mariah Carey from her second Christmas album and thirteenth studio album, "Merry Christmas II You" (2010).
 It was written and produced by Carey in collaboration with Broadway composer Marc Shaiman.
 Lyrically, it is about finding love during the Christmas season.
 The track garnered positive reviews from critics, with one describing it as an outstanding performance and the only song on the album that could compare to one of Carey's previous Christmas singles, "All I Want for Christmas Is You".
 It was released as a single in December 2012.
 An accompanying lyric video was released, and Carey has performed "Christmas Time Is in the Air Again" live on NBC's "Christmas in Rockefeller Centre" event and during her December 2014 Beacon Theatre residency called All I Want For Christmas Is You, A Night of Joy & Festivity.
"Christmas Time" is a Christmas song by American vocal group Backstreet Boys.
 The song was written by Veit Renn, Joe Smith, and Johnny Wright.
 "Christmas Time" was included on the Christmas edition of "Quit Playing Games (With My Heart)" single and on a bonus disc included in some editions of "Backstreet's Back" album.
 The song was also featured on "Platinum Christmas", a compilation album released by Jive Records in 2000, as well as many other Christmas compilation albums through the years.