The Texas Onion Fest celebrates the development of the world famous Texas 1015 Onion which was developed in Weslaco. The name of the 1015 onion came from the suggested planting date, October 15. Texas Onion Fest is sponsored by the Weslaco Area Chamber of Commerce. The festivities include live entertainment on two stages, the exciting Onion Eating Contest, delicious food, commercial booths, kiddie rides, two performances by the Dancing Horses at the Charro Arena, 1015 Market, Car Show, cooking demonstrations at the Culinary Center, and so much more!