The first Thanksgiving is believed to have been held in 1621 by Pilgrims after a successful harvest. Their feast lasted three days and, according to written accounts, 90 Native Americans were invited. The traditional Thanksgiving feast features a turkey, mashed and sweet potatoes and fall vegetables, often followed by pumpkin pie. President Lincoln declared Thanksgiving an official holiday during the Civil War in 1863. It is now celebrated on the fourth Thursday in November. The day following Thanksgiving is almost universally taken by Americans as an “unofficial holiday” in order to create a four-day weekend!