Why Thanksgiving Day has become a traditional holiday in the United States?

Hello, Thanksgiving Day (Thanksgiving Day) is an ancient holiday created uniquely by the people of the United States, and it is also a holiday for Americans to get together as a family. In the beginning, there was no fixed date for Thanksgiving Day, and it was decided on an ad hoc basis by each state in the United States. It was not until 1863, after the independence of the United States, that President Abraham Lincoln proclaimed Thanksgiving Day as a national holiday[1]. 1941, the United States Congress officially designated the fourth Thursday of November as "Thanksgiving Day". The Thanksgiving holiday usually lasts from Thursday to Sunday.

In 1879, the Canadian Parliament declared November 6 to be Thanksgiving Day and a national holiday. In the years that followed, the date of Thanksgiving changed several times until on January 31, 1957, the Parliament of Canada proclaimed the second Monday in October each year to be Thanksgiving Day. [2]

In addition to the United States and Canada, Egypt and Greece have their own unique Thanksgiving Day, but the United Kingdom, France and other European countries are insulated from Thanksgiving Day [3], and some scholars have advocated the establishment of a "Chinese Thanksgiving Day" in order to promote traditional culture. Thank you~~