At the Cuban Communist Party's sixth congress, it was an occasion for remembering and rededication.
In the "democratic" Czech Republic, the government argues that communism is a criminal ideology, just like Nazism.
Two Communist-led states of India, West Bengal, with a population of 90 million and Kerala, with 30 million, are in the midst of tough elections.
Party leaders stressed that even though some of the proposals may seem radical, their purpose is not to dismantle, but to strengthen Cuba's socialist system.
The most left-wing presidential candidate came from behind and bested a whole array of right-wing candidates to enter a runoff election.
The Japanese Communist Party has called on all successive governments to make a drastic change in the atomic energy administration and has opposed additional construction plans.