The Australian Tri-Series was an annual one day international (ODI) cricket tournament held in Australia, and contested by Australia and two touring teams. The series was the primary format for international one-day cricket throughout most of the early history of ODI cricket in Australia, staged during the height of the Australian cricket season, in the summer months of December, January and February. The tri-series was first held in 1979–80 and was contested every season until 2007–08. It has since been held only twice since 2007-08, and ODI cricket has since been played as bilateral ODI series against a single touring opponent.