August 14 and 15, 2009, a 40th anniversary tribute concert was held in Woodstock, Illinois, and was the only festival to receive the official blessing of the "Father of Woodstock", Artie Kornfeld. Kornfeld later made an appearance in Woodstock with the event's promoters. Also in 2009, Michael Lang and Holly George-Warren published The Road to Woodstock, which describes Lang's involvement in the creation of the Woodstock Music & Arts Festival, and includes personal stories and quotes from central figures involved in the event. Woodstock 50th anniversary In May 2014, Michael Lang, one of the producers and organizers of the original Woodstock event, revealed plans for a possible 50th anniversary concert in 2019 and that he was exploring various locations. Reports in late 2018 confirmed the plans for a concurrent 50th anniversary event on the original site to be operated by the Bethel Woods Centre for the Arts. The scheduled date for the "Bethel Woods Music and Culture Festival: Celebrating the golden anniversary at the historic site of the 1969 Woodstock festival" was August 16–18, 2019. Partners in the event were Live Nation and INVNT. Bethel Woods described the festival as a "pan-generational music, culture and community event" (including some live performances and talks by) "leading futurists and retro-tech experts". Michael Lang told a reporter that he also had "definite plans" for a 50th anniversary concert that would "hopefully encourage people to get involved with our lives on the planet" with a goal of re-capturing the "history and essence of what Woodstock was". On January 9, 2019, Lang announced that the official Woodstock 50th anniversary festival would take place on August 16–18, 2019, in Watkins Glen, New York. On March 19, 2019, the proposed line-up for Woodstock 50 was announced. This included some artists who performed at the original Woodstock festival in 1969: John Fogerty (from Creedence Clearwater Revival), Carlos Santana (as Santana), David Crosby (from Crosby, Stills & Nash), Melanie, John Sebastian, Country Joe McDonald, three Grateful Dead members (as Dead & Company), Canned Heat, and Hot Tuna (containing members of Jefferson Airplane). The event was to take place at Watkins Glen International, the race track in Watkins Glen, New York, the site in 1973 for the Summer Jam at Watkins Glen which drew an estimated 600,000 people. On April 29, 2019, it was announced that Woodstock 50 had been cancelled by investors (Dentsu Aegis Network), who had lost faith