The Fast of Esther (Ta'anit Ester, Hebrew: תַּעֲנִית אֶסְתֵּר‎‎) is a fast from dawn until dusk on Purim eve, commemorating the three-day fast observed by the Jewish people in the story of Purim. It is a common misconception that this fast was accepted by the Jews for all future generations during the time of Esther, as it is stated in the Book of Esther: They had established for themselves and their descendants the matters of the fasts and their cry (Esther 9:31). This verse actually refers to the four fasts which relate to mourning for the Temple. Rather, the first mention of this fast is a Minhag that is referenced in the Gaonic period. Recently, Mitchell First has written a detailed study of the origin of the fast and provided an explanation for its arising in the Gaonic period.