 Chaya Mushka Schneerson, the wife of Rabbi Menachem Mendel Schneerson, the seventh Rebbe of the Chabad Hasidic movement, died on the Hebrew day of 22nd of Shvat, 5788 (February 10, 1988).Chaya Mushka is known in the Chabad community as "the Rebbetzin".The anniversary of her death, or "yartzeit", is marked each year by the Chabad community by public gatherings, or "farbrengens".