Which fast days are obligatory by Torah or Rabbinic law?
Synopsis
Four fast days are obligatory: 9th of Av, 17th of Tammuz, 3rd of Tishrei (Fast of Gedaliah), and 10th of Tevet, all rooted in prophetic tradition via Zechariah.
More in Fast Days
Why do we fast on the 17th of Tammuz rather than the 9th of Tammuz, although the First Temple was breached on the 9th?
4 opinions
If one errs and eats on a fast day, must one complete the fast afterward?
1 opinions
Is it permitted to establish a communal fast on the 9th of Tammuz in addition to the obligatory 17th?
2 opinions
What is the nature of the four fasts in terms of biblical versus rabbinic obligation?
2 opinions
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