Is Erev Yom Kippur classified as a 'Yom Tov' for purposes of vow exclusions?

When an individual accepts upon themselves a fast for a specified number of days, and Shabbat, Yom Tov, Rosh Chodesh, Hanukkah, Purim, or Erev Yom Kippur fall within those days, does the fast obligation apply to those special days?

3 opinions

When one vows explicitly to fast on Shabbat, Yom Tov, Erev Yom Kippur, Hanukkah, Purim, or Rosh Chodesh specifically, what is the halakhic status of such a vow?

2 opinions

When one takes a shevua (oath) to fast on certain days, and Shabbat, Yom Tov, Erev Yom Kippur, Hanukkah, Purim, or Rosh Chodesh fall within those days, does the oath apply?

3 opinions

What is the status of a fast accepted for a small number of days (e.g., one or two specific days) in terms of whether it requires sage's release?

1 opinions

Is the obligation for a sage to release a vow absolute, and what opening should the sage use when granting release?

2 opinions

Are Hanukkah and Purim considered 'Yom Tov' in common speech and vow language?

2 opinions

What is the status of Rosh Chodesh (new month) when it falls within a vowed multi-day fast?

3 opinions across 3 eras