On the night of September 1, 1969, an otherwise peaceful Labor Day in the quiet town of Sheffield, Massachusetts, was disrupted by a series of mysterious events. That night, numerous witnesses across Berkshire County reported seeing strange, unidentifiable flying objects in the sky.

Some even claimed to have experienced missing time and encounters with extraterrestrial beings. What happened that night has come to be known as the Berkshire UFO incident, a case that remains one of the most compelling and well-documented mass UFO sightings in U.S. history.

What exactly occurred in Berkshire on that fateful night? And why has the case continued to resonate, more than fifty years later?