The Presidents Cup has been held biennially since 1994. Initially, it was held in even numbered years, with the Ryder Cup being held in odd numbered years. However, the cancellation of the 2001 Ryder Cup due to the September 11 attacks pushed both tournaments back a year, and the Presidents Cup began being held in odd numbered years. The COVID-19 pandemic led to the cancellation of the 2020 Ryder Cup, and the Presidents Cup is returning to being held in even numbered years as a consequence.