For five weeks in 1977, the Chabad-Lubavitch movement and people the world over anxiously prayed for the recovery of the Rebbe, Rabbi Menachem Mendel Schneerson, of righteous memory, after he suffered a sudden massive heart attack that left the doctors wondering whether he would pull through. On the first day of the month of Kislev (“Rosh Chodesh”), after just thirty eight days of convalescence, the Rebbe returned to public life. Until today, Rosh Chodesh Kislev is celebrated as the day when chassidim were united with their Rebbe.