Watch What Happened to Monday (2017) HD Full Movie Free on SolarMovie. Watch What Happened to Monday (2017) online free. In a world where families are limited to one child due to overpopulation, a set of identical septupl...In a world where families are limited to one child due to overpopulation, a set of identical septuplets must avoid being put to a long sleep by the government and dangerous infighting while investigating the disappearance of one of their own.