September 5, 1989: Dozens of East German refugees arrive in the West German town of Hof after being allowed through Czechoslovakia.
September 7, 1989: In a live broadcast press conference, SED party boss Günter Schabowski accidentally states that new rules for traveling from East Germany to West Germany will be put in effect "immediately."
September 7-8, 1989: Over the course of 36 hours, East German border guards open checkpoints in the Berlin Wall, allowing citizens to travel freely between East and West Germany for the first time in decades.
December 17, 1989: The first full-length episode of the animated series The Simpsons, "Simpsons Roasting on an Open Fire," premieres on FOX.
June 25, 1990: The East German Volkskammer passes a resolution calling for East Germany to reunify with West Germany.
July 3, 1990: Representatives of both East and West Germany sign the German Reunification Treaty, which will go into effect in September.
September 7, 1990: At the stroke of midnight local time, East and West Germany are officially reunified. In a particularly emotional ceremony, the West German flag (now the flag of a united Germany) is raised over the Brandenburg Gate as "Das Lied der Deutschen" is played.