In the United States, the idea of Thanksgiving resulted from the efforts of Sara Josepha Hale, the Martha Stewart of the nineteenth century and Abraham Lincoln, who wanted to establish a tradition that would bring the United States together as a country.
I never knew this history of Thanksgiving, but I think that this example very clearly demonstrates the idea of invented tradition. I have always thought of Thanksgiving as being one of the "purest" American traditions. Thanksgiving is taught as a time solely for family bonding and celebrating American history. However, it makes sense that the true origens of Thanksgiving were due to a hidden agenda. The goals of bringing the country together during the Civil War and boosting the economy after the Great Depression are definitely bigger than individual family units. Thus, it is easy to see how invented traditions emerge.