The Ashes is a Test cricket

Test cricket

Test cricket is the longest form of the sport of cricket. Test matches are played between national representative teams with "Test status", as determined by the International Cricket Council , with four innings played between two teams of 11 players over a period of up to a maximum five days...

 series played between England and Australia. It is one of the most celebrated rivalries

Sports rivalry

A sports rivalry is intense competition between athletic teams or athletes. This pressure of competition is felt by players, coaches, and management, but is perhaps felt strongest by the fans. The intensity of the rivalry varies from a friendly competition on one end to serious violence on the...

 in international cricket and dates back to 1882. It is currently played biennially, alternately in the United Kingdom and Australia. Cricket being a summer sport, and the venues being in opposite hemispheres, the break between series alternates between 18 and 30 months. A series of "The Ashes" comprises five Test matches, two innings per match, under the regular rules for Test match cricket.