The April 5th Movement, also known as the Tiananmen Incident, was a nationwide mass protest against the Gang of Four that took place in 1976. In 1975 Deng Xiaoping, with the support of Mao Zedong, had taken charge of the day-to-day work of the Central Committee and begun to consolidate work in all fields, thus bringing about a marked turn for the better in the domestic situation. But Mao Zedong, who could not accept Deng's systematic correction of the mistakes of the "cultural revolution", launched a movement to "criticize Deng Xiaoping and counter the Right deviationist tendency to reverse correct verdicts". In January 1976 Zhou Enlai passed away, causing great sorrow throughout the Party and the nation. In April of the same year, around the time of the Qing Ming (Pure Brightness) Festival, a traditional day for remembrance of the dead, a powerful mass movement arose in Beijing, Nanjing and many other cities across the country to commemorate Zhou Enlai and oppose the Gang of Four. The Gang of Four did their utmost to suppress this movement, which was in essence an expression of support for correct Party leadership, as represented by Deng Xiaoping. On April 5 a huge crowd went to Tiananmen Square in protest. The Political Bureau and Mao Zedong wrongly labelled the protest a "counter-revolutionary incident" and dismissed Deng from all his posts both inside and outside the Party. In December of 1978, at its Third Plenary Session, the Eleventh Central Committee (see note 3) decided to cancel the documents issued by the Central Committee on the movement to "criticize Deng Xiaoping and counter the Right deviationist tendency to reverse correct verdicts" and on the Tiananmen Incident, proclaiming the rehabilitation of Deng and reversing the official assessment of the incident.