Days of Eclipse (Russian: Дни затмения) (or, The Days of Eclipse, Dni Zatmenija, Días de eclipse) is an award winning 1988 Soviet film directed by Aleksandr Sokurov. The screenplay is by Yuri Arabov and Pyotr Kadochnikov based on a screenplay by Arkady and Boris Strugatsky, which is in turn based on their novel Definitely Maybe (Billion years to the end of the world, Russian: «За миллиард лет до конца света»).
A recently qualified medical doctor, Dmitri Malyanov, has taken a posting to a remote and very poor part of Soviet Turkmenistan. On top of his day job as a pediatrician Malyanov is undertaking research into the effects of religious practice on human health. His research has drawn the politically incorrect conclusion that religious faith does indeed improve health. However, as he attempts to write up his thesis various sorts of improbable, bizarre events take place one after another. Malyanov perceives that some force is preventing him from completing his research.