<human>:  I have a question about a book I’m reading called D-Day: 50 Years On. When did the D-Day landings take place?
<bot>: The D-Day landings took place on June 6, 1944. The landings were part of Operation Overlord, the Allied invasion of Normandy in World War II. The landings were the largest seaborne invasion in history, with more than 150,000 Allied troops landing on the beaches of Normandy.