Worldcon, or more formally The World Science Fiction Convention, is a science fiction convention held each year since 1939 (except for the years 1942 to 1945, during World War II).
Worldcon, or more formally The World Science Fiction Convention, the annual convention of the World Science Fiction Society (WSFS), is a science fiction convention. It has been held each year since 1939 (except for the years 1942 to 1945, during World War II).