This day is the chassidic festival of didan natzach ("our side is victorious," viz. Vayikra Raba 24:3) marking the issuance, in 5747 (1987), of a US Federal Court ruling which placed the legal imprimatur of the USA upon the total exclusive ownership by Agudas Chassidei Chabad of the great library and collection of s'farim (Torah-books) and k'tavim (manuscripts) of the Chabad Rebbe'im. "The day on which 'our side was victorious' (didan natzach) openly, in sight of all the nations (in Federal Court) with regard to the s'farim and k'tavim of our Rebbe'im - leaders, in the library of Lubavitch."