Esther 9:18 (ESV)

18 But the Jews who were in Susa gathered on the thirteenth day and on the fourteenth, and rested on the fifteenth day, making that a day of feasting and gladness.

Of course, for the Jews in Susa, the day of rest and feasting came one day later, on the fifteenth of Adar (see Esther 9:13–15).