time. Today, Test matches are scheduled to be played across five consecutive days. However, in the early days of Test cricket, matches were played for three or four days. Four-day Test matches were last played in 1973, between New Zealand and Pakistan. Until the 1980s, it was usual to include a 'rest day,' often a Sunday. There have also been 'Timeless Tests', which have no predetermined maximum time. In 2005, Australia played a match scheduled for six days against a World XI, which the ICC sanctioned as an official Test match, though the match reached a conclusion on the fourth day. In October 2017, the ICC approved a request for a four-day Test match, between South Africa and Zimbabwe, which started on 26 December 2017 and ended on the second day, 27 December. The ICC trialed the four-day Test format until the 2019 Cricket World Cup. In December 2019, Cricket Australia were considering playing four-day Tests, subject to consensus with other Test nations. Later the same month, the ICC considered the possibility of making four-day Test matches mandatory for the ICC World Test Championship from 2023. There have been attempts by the ICC, the sport's governing body, to introduce day-night Test matches. In 2012, the International Cricket Council passed playing conditions that allowed for the staging of day-night Test matches. The first day-night Test took place during New Zealand's tour to Australia in November 2015. Play Test cricket is played in innings (the word denotes both the singular and the plural). In each innings, one team bats and the other bowls (or fields). Ordinarily four innings are played in a Test match, and each team bats twice and bowls twice. Before the start of play on the first day, the two team captains and the match referee toss a coin; the captain who wins the toss decides whether his team will bat or bowl first. In the following scenarios, the team that bats first is referred to as Team A and their opponents as Team B. Usually the teams will alternate at the completion of each innings. Thus, Team A will bat (and Team B will bowl) until its innings ends, and then Team B will bat and Team A will bowl. When Team B's innings ends, Team A begin their second innings, and this is followed by Team B's second innings. The winning team is the one that scores