January 1, 1920
Tennis at the 1920 Summer Olympics — Tennis at the Olympics
Rowing at the 1920 Summer Olympics — rowing regatta
Korenizatsiya — integration of the non-Russian peoples to the Soviet Union by promoting their languages and cultures
Nakba Day — Palestinian day of commemoration
Water polo at the 1920 Summer Olympics — water polo at the Olympics
Football at the 1920 Summer Olympics — 1920 edition of the association football tournament during the Olympic Games
Leninism — communist ideology and state ideology of socialist states, as developed by Vladimir Lenin
Swimming at the 1920 Summer Olympics — swimming events at the Olympics
1920 South American Championship — football tournament
Estonia at the 1920 Summer Olympics — sporting event delegation