Official Cuban media : 5000 people from Havana gather at the capital 's Independence Square . Activists say dire economic conditions in Cuba have prevented structural change . Around the world , May Day has historically brought expressions of support for communism and socialism .
Official Cuban media : 600,000 people from Havana gathered at the capital 's Revolution Square . Activists say dire economic conditions in Cuba have necessitated structural change . Around the world , May Day has historically brought displays of support for Communism and socialism .