Major markets's regular day off increased an average of 5.5% of Jeju's traditional markets' sales and overall Customer traffic also had increased. The research, conducted by major market's closed duties evaluation, had shown results of a 5.5% increase by shops, and customer traffic had increased by 25 people, showing a 4.9% improvement. According to the research, Seo mun public market had the greatest effect on sales,as it grew by 10.4% compared to major market's mandatory closing day. It can be interpreted that visitors naturally turned to the traditional market, and markets provided higher discounts and free parking to attract customers. Meanwhile, Jeju is collecting comments and suggestions of large major markets and local businesses, Major retailers are continuing their mandatory day off every second Friday and fourth Saturday of each month.