משנה אויף בראשית 17:14

There are in the Torah thirty-six [transgressions which are punishable with] karet:When one has intercourse with his mother, His father's wife; Or his daughter-in-law; When a man has intercourse with a male, Or with a beast, Or when a woman brings a beast upon herself; When one has intercourse with a woman and her daughter; Or with a married woman; Or with his sister; Or with his father's sister; Or his mother's sister; Or his wife's sister; Or his brother's wife; Or the wife of his father's brother; Or with a menstruating woman; One who blasphemes [the Lord]; One who worships idols; Or dedicates his children to Molech; Or has a ba’al ov; Or desecrates the Shabbat; When an unclean person eats of sacred food; Or when one enters the precincts of the Temple in an unclean state; When one eats forbidden fat, Or blood; Notar; Or piggul; When one slaughters Or offers up [a consecrated animal] outside [the Temple]; One who eats anything leavened on Pesah; One who eats Or works on Yom Kippur; One who compounds the oil [of anointing]; Or compounds incense; Or uses [unlawfully] oil of anointing; And [when one transgresses the laws of] the pesah, And circumcision from among positive commandments.

The annulment of vows is the whole day. This may result in a stringency or in a leniency. How is this so? If she vowed on the eve of the Sabbath, he can annul on the eve of the sabbath and on the Sabbath day until nightfall. If she vowed just before nightfall, he can annul only until nightfall: for if night fell and he had not annulled it, he can no longer annul it.