The Ould Lammas Fair is an annual event held in Ballycastle, Northern Ireland, typically during the last weekend of August. This traditional fair dates back to the 17th century and celebrates the end of the harvest season. It features a variety of stalls selling local crafts, food, and livestock, attracting visitors from all over the region. One of the fair's highlights is the sale of Lambs, which is where the fair gets its name. In addition to livestock, the event includes live music, entertainment, and various competitions, making it a vibrant community gathering that showcases local culture and heritage.