By Rabbi Julian Sinclair, March 9, 2014
When Esther decides to try to prevent the massacre of the Jewish people, she charges Mordecai to assemble all the Jews and fast on her behalf for three days. According to the Talmud, Esther’s original three-day fast was over Pesach. Pesach, however, isn’t a good time to hold a fast, for obvious reasons. Instead most Jewish communities instituted a one-day fast right before Purim.