Purim
There is a tale in the Hasidic Chabad movement that supposedly Joseph Stalin died as a result of some metaphysical intervention of the seventh Chabad leader, Rabbi Menachem Mendel Schneerson, during the recitation of a discourse at a public Purim Farbrengen. Stalin was suddenly paralyzed on 1 March 1953, which corresponds to Purim 1953, and died 4 days later. Due to Stalin's death, nationwide pogroms against Jews throughout the Soviet Union were averted, as Stalin's infamous doctors' plot was halted.
Cold War
After the death of Joseph Stalin, Nikita Khrushchev became the Soviet leader following the deposition and execution of Lavrentiy Beria and the pushing aside of rivals Georgy Malenkov and Vyacheslav Molotov. On 25 February 1956, Khrushchev shocked delegates to the 20th Congress of the Soviet Communist Party by cataloguing and denouncing Stalin's crimes. As part of a campaign of de-Stalinization, he declared that the only way to reform and move away from Stalin's policies would be to acknowledge errors made in the past.