Question: What is the birthday of the American singer-songwriter who founded Windstar Records?

Context articles: Windstar Records
Fast Car
Jacob Golden
Higher Ground (John Denver album)
A Portrait (John Denver album)
Happy Birthday to You
Happy Birthday (mixtape)
What Kind of World (Brendan Benson album)
The 1989 World Tour
John Denver

Windstar Records is a record label based in Snowmass, Colorado, that was founded by John Denver in 1976.
"Fast Car" is a song by American singer-songwriter Tracy Chapman.
 It was released in April 1988 as the lead single from her self-titled debut album.
 Her appearance on the Nelson Mandela 70th Birthday Tribute was the catalyst for the song's becoming a top 10 hit in the United States, peaking at number 6 on the "Billboard" Hot 100, and a top 10 hit in the United Kingdom, peaking at number 4 on the charts.
Jacob Golden an American singer-songwriter and guitarist from Portland, Oregon.
 After the dissolution of his former band, Birthday, in 2000 he has worked as a solo artist and collaborated with different electronica musicians and producers.
Higher Ground is the 20th album by American singer-songwriter John Denver.
 Released in September 1988, it was his first on the Windstar label and his final album of the 1980s.
 It was recorded at Denver's private studio in Snowmass, Colorado, with the exception of "For You" and the didjeridu part in "Sing Australia."
 These were recorded in Sydney, Australia.
 The album shares its title with Denver's television movie "Higher Ground", which uses the album's title song as its opening theme.
John Denver - A Portrait is an album made by Windstar Records and features the music of John Denver.
 A similarly named Portrait was released by BMG in 1999.
 The BMG release was a two-disc set.
"Happy Birthday to You", more commonly known as simply "Happy Birthday", is a song that is traditionally sung to celebrate the anniversary of a person's birth.
 According to the 1998 "Guinness World Records", "Happy Birthday to You" is the most recognized song in the English language, followed by "For He's a Jolly Good Fellow".
 The song's base lyrics have been translated into at least 18 languages.
 The melody of "Happy Birthday to You" comes from the song "Good Morning to All", which has traditionally been attributed to American sisters Patty and Mildred J. Hill in 1893, although the claim that the sisters composed the tune is disputed.
Happy Birthday is the fourth mixtape released by British rapper Tinie Tempah.
 The mixtape was released for free download on December 16, 2011 on Disturbing London Records - featuring production from 3Mindz, S-X, Wizzy Wow and Stargate.
 The mixtape title is "Happy Birthday" because the mixtape came into production around Tempah's 23rd birthday (November 7).
 Tracks "Like It or Love It", "Lucky Cunt" and "Till I'm Gone (Remix)" were leaked prior to the mixtape release to create buzz, with "Like It or Love It" receiving minor radio airplay.
 "Happy Birthday" features British rappers Chipmunk, Giggs, Wretch 32, G-Frsh, Tinchy Stryder and Krept and Konan, including a variety of American rappers; Soulja Boy, J. Cole and Big Sean, along with Wiz Khalifa, Pusha T and Jim Jones on the "Till I'm Gone" remix (originally released on August 29, 2011).
 British vocalist J. Warner also makes a guest appearance.
What Kind of World is the fifth album by American singer-songwriter Brendan Benson.
 The album's release on April 21, 2012 coincided with his son's second birthday.
 The album was released on Benson's own Readymade Records in the US and British indie label Lojinx in Europe.
 It peaked at number 7 on the UK Indie album chart in the week of release.
The 1989 World Tour was the fourth concert tour by American singer-songwriter Taylor Swift, in support of her fifth studio album, "1989" (2014).
 The tour's European and North American dates, as well as two shows in Japan, were announced in November 2014, followed by the Oceania dates in December 2014.
 Additional dates for Singapore and Shanghai were announced in June 2015 with a third and final Melbourne show announced in July 2015.
 The tour began on May 5, 2015, in Tokyo, Japan and concluded on December 12, 2015 in Melbourne, Australia, the day before her 26th birthday.
 The tour became Swift's highest grossing and most attended tour to date, mobilizing 2,278,647 fans and $250,733,097 revenue.
 It was the highest grossing tour in the world in 2015.
Henry John Deutschendorf Jr. (December 31, 1943 – October 12, 1997), known professionally as John Denver, was an American singer-songwriter, record producer, actor, activist, and humanitarian, whose greatest commercial success was as a solo singer.
 After traveling and living in numerous locations while growing up in his military family, Denver began his music career with folk music groups during the late 1960s.
 Starting in the 1970s, he was one of the most popular acoustic artists of the decade and one of its best-selling artists.
 By 1974, he was firmly established as America's best selling performer, and AllMusic has described Denver as "among the most beloved entertainers of his era".