The informant related a holiday tradition.
Around Christmas time, the informant would make a family cookie recipe (itself not folklore since it has been written down for many years). However, the tradition of making the cookies is folklore. One year, she was inspired by watching the annual broadcast of Rudolph the Red-Nosed Reindeer to make the cookies and liked the festive atmosphere that created. Thereafter, the making of the cookies was determined by the TV guide since it became traditional to make the “snowball cookies” only when Rudolph was on the TV. Eventually she purchased a VCR and was able to make the cookies on her own time. She still only makes them to Rudolph though, and only in the holiday. She has passed the tradition on to her husband and sun as well. She thereby contributed to the evolution of the tradition of baking cookies by adding another element to the ritual.