Jewish Book Day, also known as Sefarim Victory Day or Didan Notzah, is observed worldwide on December 25. This holiday is celebrated by the Chabad-Lubavitch community to commemorate a significant legal victory regarding the ownership of a library of rare religious books, which was the subject of a court case involving Agudas Chasidei Chabad and Barry Gourary. The origins of the holiday trace back to a federal court ruling in favor of the Chabad-Lubavitch movement, affirming their ownership of the library, which includes thousands of rare volumes and artifacts. The event emphasizes the importance of preserving religious texts and their rightful ownership. The Chabad-Lubavitch movement, founded in 1775 by Rabbi Shneur Zalman of Liadi, has played a crucial role in this celebration, reflecting their commitment to maintaining their cultural and religious heritage.