A 1968 act of Congress said which holiday would be celebrated on the second Monday in October?

A 1967 law kept English as an official language in India until all states would accept which language? The severe Sahel droughts beginning in the late 1960s pushed which desert southward? A 1968 Soviet film of which Russian novel was released in the U.S. in a shortened version of just over six hours? In which 1968 George Romero film do characters learn "kill the brain and you kill the ghoul"? In which 1968 horror film does the title character make it a family of three for the Woodhouses? In 1969 the Supreme Court ruled that desegregating schools "with all deliberate" what, the famous Brown II phrase, was… A 1969 war between Honduras and El Salvador broke out after qualifying matches for which sporting event? A 1970 act of Congress created which agency that sets standards for workplace safety and health?