On this site it's showing up as a 1981 film.
Depends on the country. Some places it was December 1980, others, including the US, were 1981.
True: December 4, 1980: Australia April 9, 1981: United Kingdom June 19, 1981: United States Interesting. Wonder why Australia got it first....then the U.K...how appalling.
It is pretty much an 81 movie along with Raiders and Clash
Me too.