Throughout history mankind has celebrated the bountiful harvest with thanksgiving ceremonies.  Before the establishment of formal religions many ancient farmers believed that their crops contained spirits which caused the crops to grow and die.   Many believed that these spirits would be released when the crops were harvested and they had to be destroyed or they would take revenge on the farmers who harvested them.   Some of the harvest festivals celebrated the defeat of these spirits.  Harvest festivals and thanksgiving celebrations were held by the ancient Greeks, the Romans, the Hebrews, the Chinese and the Egyptians.

The Greeks
The ancient Greeks worshipped many gods and goddesses.  Their goddess of corn (actually all grains) was Demeter who was honored at the festival of Thesmosphoria held each autumn.  On the first day of the festival married women (possibility connecting childbearing and the raising of crops) would build leafy shelters and furnish them with couches made with plants.  On the second day they fasted.  On the third day a feast was held and offerings to the goddess Demeter were made: gifts of seed corn, cakes, fruit, and pigs.  It was hoped that Demeter's gratitude would grant them a good harvest.

The Romans
The Romans also celebrated a harvest festival called Cerelia, which honored Ceres their goddess of corn (from which the word cereal comes).  The festival was held each year on October 4th and offerings of the first fruits of the harvest and pigs were offered to Ceres.  Their celebration included music, parades, games and sports and a thanksgiving feast.

The Chinese
The ancient Chinese celebrated their harvest festival, Chung Ch'ui, with the full moon that fell on the 15th day of the 8th month.  This day was considered the birthday of the moon and special "moon cakes", round and yellow like the moon, would be baked.  Each cake was stamped with the picture of a rabbit.  It was a rabbit, not a man, which the Chinese saw on the face of the moon.  The families ate a thanksgiving meal and feasted on roasted pig, harvested fruits and the "moon cakes".  It was believed that during the three day festival flowers would fall from the moon and those who saw them would be rewarded with good fortune.

The Egyptians
The ancient Egyptians celebrated their harvest festival in honor of Min, their god of vegetation and fertility.  The festival was held in the springtime, the Egyptian's harvest season.  The festival of Min featured a parade in which the Pharaoh took part.  After the parade a great feast was held.  Music, dancing and sports were also part of the celebration.  When the Egyptian farmers harvested their corn, they wept and pretended to be grief stricken.  This was to deceive the spirit which they believed lived in the corn.  They feared the spirit would become angry when the farmers cut down the corn where it lived.

The United States
In 1621, after a hard and devastating first year in the New World the Pilgrim's fall harvest was very successful and plentiful.  There was corn, fruits, vegetables, along with fish which was packed in salt, and meat that was smoke cured over fires.  They found they had enough food to put away for the winter.  The Pilgrims had beaten the odds.  They built homes in the wilderness, they raised enough crops to keep them alive during the long coming winter.  They were at peace with their Indian neighbors.   Their Governor, William Bradford, proclaimed a day of thanksgiving that was to be shared by all the colonists and the neighboring Native American Indians.  The custom of an annually celebrated thanksgiving, held after the harvest, continued through the years.  During the American Revolution, a day of national thanksgiving was suggested by the Continental Congress.  In 1817 New York State adopted Thanksgiving Day as an annual custom.  By the middle of the 19th century many other states also celebrated a Thanksgiving Day.  In 1863 President Abraham Lincoln appointed a national day of thanksgiving.  Since then each president has issued a Thanksgiving Day proclamation, usually designating the fourth Thursday of each November as the holiday.

Canada
Thanksgiving in Canada is celebrated on the second Monday in October.  Observance of the day began in 1879.