Yosef Karo

“ Paragraph 1 - We annul vows on Shabbat if the vows' content is relevant to a Shabbat necessity, like if someone vowed not to eat or drink. We do this even if he had the opportunity to annul them before Shabbat. The husband can annul his wife's vows even if they are not relevant to Shabbat, because if he does not annul them today, he will not ever be able to annul them. ”