In July 2019, Metallica announced a set of South American tour dates for April 2020 with Greta Van Fleet in support. In September, ahead of that year's Global Citizen Festival, it was announced that Metallica would perform at the following year's festival in September 2020 alongside artists such as Billie Eilish, Miley Cyrus and Coldplay, in what would be the final event of Global Poverty Project's year-long Global Goal Live: The Possible Dream campaign. The following day, on September 27, Metallica announced that Hetfield had re-entered a rehabilitation program and that its Australia/New Zealand tour would be postponed. In a statement by Ulrich, Hammett and Trujillo, the band spoke of the devastation of the news, saying that Hetfield " been struggling with addiction on and off for many years" and that all tickets would be fully refunded. Ulrich later added that Hetfield was "in the process of healing himself", and that the band hoped to return to Australia and New Zealand in 2020. The band's other commitments, including a benefit concert in March 2020, were still expected to continue as planned; a further five US festival appearances were announced in October. These shows were later postponed or cancelled due to the COVID-19 pandemic and to support Hetfield's recovery. In March 2020, the band began a series on YouTube and Facebook called "Metallica Mondays", where they streamed full archived shows every Monday to relieve boredom while staying home and social distancing amid the pandemic. In May 2020, while in quarantine, Metallica performed a virtual acoustic version of "Blackened", titled "Blackened 2020", which was later made available for download.