When may the compensatory fast (ta'anit le'ta'anito) for fasting ta'anit chalom on Shabbat be observed — may it be observed on Chanukah, Purim, or Yom Tov?
Synopsis
The Rema rules that the compensatory Sunday fast may not be observed on Chanukah, Purim, or Yom Tov (even the second day). There is a dispute whether days of non-binding custom (e.g., Nissan, Aseret Yemei Teshuva) exempt the compensatory fast.
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Discussion
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