Do you know Thanksgiving Day? Do you know why human thank God? 　　Thanksgiving falls on the fourth Thursday of November, a different date every year. The President must proclaim that date as the official celebration. 　　Thanksgiving is a time for tradition and sharing. Even if they live far away, family members gather for a reunion at the house of an older relative. All give thanks together for the good things that they have. 　　In this spirit of sharing, civic groups and charitable organizations offer a traditional meal to those in need, particularly the homeless. On most tables throughout the United States, foods eaten at the first thanksgiving have become traditional.