The Third Spas is celebrated every year on August 29th. Our ancestors baked bread on this day, collected ripe nuts and traded linen at fairs. The people said: “The First Savior - they stand on the water; Second Spas - eat apples; Third Savior - canvases are sold on the green mountains.Walnut Spas has several names. One of them is the Savior Not Made by Hands. Biblical tradition says that after sleeping, Jesus Christ washed his face and wiped his face with a towel. And on this towel the face of the Son of God was imprinted, from which the first icons of the Savior Not Made by Hands were subsequently painted. The canvas with the face of Christ healed the ruler of the city of Edessa, thanks to which Orthodoxy began to spread much more actively in these places. Since then, the Image of Christ Not Made by Hands has been a symbol of this day. The Slavs believed that the Lord was created by the Almighty himself, and this event should be honored.
Walnut Savior is perhaps the most popular name for this holiday. It was believed that on this day the nuts ripen and you can start collecting them. The harvest was carried to the church, consecrated and made from it for the winter.
Source: https://www.kp.ru/family/prazdniki/orekhovyj-spas/