Ireland national rugby union team tournament. It is contested against England, France, Italy, Scotland and Wales. Ireland was a member of the inaugural Home Nations in 1883, with France and Italy joining later to form the Five and Six Nations respectively. Ireland won their first championship in 1894, also winning the Triple Crown. Ireland's first Grand Slam occurred in the 1948 season and their second in the 2009 season. In total Ireland have been outright champions on fourteen occasions following their title in the 2018 Six Nations Championship and have nine shared wins. Ireland won their third ever Grand Slam in the 2018 Six Nations
Explorers Grand Slam complete a "True Explorers Grand Slam". In June 2018, Zhang Liang became the second person to complete this kind of Grand Slam. In 2011, former Wales rugby union international Richard Parks became the first person ever to complete the (Last Degrees) Grand Slam within a single calendar year, doing so within seven months. Cheryl Bart is the first Australian female and the 31st person worldwide to complete the Explorer's Grand Slam. She completed the North Pole on 22 April 2013 AEST. Vanessa O'Brien became the first woman to complete the (Last Degree) Grand Slam under a single calendar year, doing