If one vows to fast on a specific day and forgets to fast, eating a kezayit, must he complete that day's fast?

If one vows to fast one or two days without specifying which days, and forgets to eat, does the fast become void and require compensation?

1 opinions

If one vows to fast ten days (unspecified) but must break the fast mid-vow for a mitzvah or honor, can the fast be 'borrowed' and repaid later?

4 opinions

Can one vow to fast a number of days without specifying them, and later reschedule the fasts to winter?

2 opinions

Can consecutive fasts be equated with non-consecutive fasts as equivalent fulfillment?

3 opinions

May one fast for a dream (or other personal fast) on a festival day, Hol Hamoed, Rosh Hodesh, Hanukkah, Purim, or the day before Yom Kippur?

1 opinions

Are public fasts observed in Babylonia (post-rabbinic diaspora tradition) with the same strictures as Yom Kippur?

2 opinions

If a parent dies in Adar during a leap year, which Adar does one fast in for Yahrzeit?

3 opinions

Must one fast on the anniversary of a parent's death, or may one fast on the day of burial instead?

1 opinions