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?

Fasts & MourningPersonal Fasts

Synopsis

A vow to fast a single day (or small number of specific days) may not constitute a full vow if not phrased in binding vow language, and simple acceptance language does not require release.

Early Acharonim
Lenient
Strict
Lesser cited
Major authority

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