by Rabbi Tzvi Hirsch Haber | Jan 5, 2009
There are six obligatory fast days. One is biblically mandated, four were established by the later prophets (Chaggai, Zechariah and Malachi), and one is merely a widely accepted custom. The biblically mandated one is Yom Kippur. The Torah tells us: (Vayikra 16:29)...
