Worldcon, also known as the World Science Fiction Convention, is the annual convention of the World Science Fiction Society (WSFS). It was first held in 1939 and, after a hiatus during World War II, has been held continuously since 1946. The sites of future Worldcons are decided by WSFS members via a bidding process. The 2016 edition of WorldCon is being held in Kansas City, Missouri. The 2017 edition is being held in Helsinki, Finland.