Vowing to fast for six days of Shawwal without specification

A: She has to fulfill her vow according to her intention when making the vow. If when she made the vow, she meant fasting the first six days of Shawwal of the same year, she only has to fast those days, and she is not obliged to fast them every year; but if she meant fasting the first six days of Shawwal every year, she has to fast them every year.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.