The Jews in Susa, however, had assembled on the thirteenth and the fourteenth days of the month. So they rested on the fifteenth day, making it a day of feasting and joy.
Jewish Publication Society of America Version (JPS1917) - Esther 9:18 >But the Jews that were in Shushan assembled together on the thirteenth day thereof, and on the fourteenth thereof; and on the fifteenth day of the same they rested, and made it a day of feasting and gladness.