Old Home Week is a practice that originated in the New England region of the United States similar to a holiday or festival. In its beginning in the 19th–20th century it involved a municipal effort to invite former residents of a village, town, or city—usually individuals who grew up in the municipality as children and moved elsewhere in adulthood—to visit the "Old Home", the parental household and home town.
In the late 20th and early 21st century, the practice has spread to other parts of North America and has become a broader celebration with an emphasis on local culture and history. From the Wilmington, Vermont town web site:
References
Old Home Week Wikipedia(Text) CC BY-SA