What was the longest encore?

Answer 1

The longest encore in concert history is often attributed to The Grateful Dead, who played a 10-hour set at the 1973 Summer Jam at Watkins Glen. However, the longest single encore is usually credited to Pearl Jam, who performed for nearly an hour and a half during a concert in 2016 in Florence, Italy. These performances are celebrated for their spontaneity and the band's connection with their audience.