(22 Shvat) The yartzeit of Chaya Mushka Schneerson, the wife of Rabbi Menachem Mendel Schneerson.Gimmel Tammuz – The yartzeit of Rabbi Menachem Mendel Schneerson, the seventh rebbe of Chabad.A Brief Biography. Chabad.org. Other events Other significant Chabad holidays commemorate individual incidents involving the Chabad rebbes:Rosh Chodesh Kislev (1 Kislev) – Marking Rabbi Menachem Mendel's recovery from a massive heart attack in 1977.Hei Teves (5 Tevet) – Marking the outcome of the court case over the ownership of the Chabad library, and the return of the stolen books. (See Library of Agudas Chassidei Chabad#"Hey Teves" lawsuit)Tes Vav Elul (15 Elul) – Marking the founding of Tomchei Tmimim also known as "Chodorom".Yud Shevat'' (10 Shevat) - Marking the day that the seventh Rebbe of Lubavitch (Rabbi Menachem Mendel Schnerson) Accepted the Chabad Leadership in 1951(Also the date of the sixth Lubavitcher Rebbe's passing in 1950). See also Chabad Jewish customs References Chabad-Lubavitch (Hasidic dynasty)