The Norwegian Literature Festival – Sigrid Undset Days is an annual festival that takes place in Lillehammer, known as the largest literature festival in the Nordic region. The festival has a varied program that targets readers of all ages, and offers a number of activities and events. Lillehammer was recognized as a UNESCO City of Literature in 2017, which emphasizes the city's importance in literature and culture.
The festival has a wide range of events that include author meetings, readings, debates, lectures and award ceremonies. In addition, performances, exhibitions, seminars, quizzes and other festivities are offered. The events are adapted to different target groups, from schoolchildren and families with children to students and adult culture enthusiasts. The festival takes place at the end of May and creates a lively atmosphere in the city, where literature and words are at the center.