the normal prohibition of fasting on Passover, the "Fast of Esther" instead became attached to the eve of Purim, the 13th of Adar. The 13th of Adar itself is thought to have been a fast day for the warriors while going out to battle, as it is believed to have been customary to fast during the battle in order to gain divine favor. Date in the Gregorian calendar The Gregorian calendar dates, from dawn until nightfall, for 2021–2026 are: See also Fasting in Judaism Aneinu Selichot Haman (Bible) Amalek References External links The month of Adar and the holiday of Purim, minhagim (customs) and halachot (laws) in Peninei Halakha by Rabbi Eliezer Melamed Jewish Holidays at Orthodox Union Adar observances Esther Jewish fast days