Seoul hosted the 1988 Summer Olympics during the modern period in which Chuseok travel traditions became increasingly visible nationwide.
The city is South Korea’s capital and largest metropolitan center, making it a major origin point for Chuseok journeys. Each year, large numbers of residents travel from Seoul and the surrounding capital region to ancestral hometowns and family homes across the country.
The 1988 Olympics were held in Seoul from September 17 to October 2, 1988. The event drew worldwide attention to South Korea and took place during a period of rapid economic growth, urbanization, and expanding national transportation networks. Those changes helped make holiday travel a prominent part of modern Chuseok life.
The question concerns the host city, not the festival’s date or origin. Chuseok itself predates the modern Olympic Games by many centuries and is rooted in Korea’s traditional lunar calendar and harvest customs.