New International Version
to establish these days of Purim at their designated times, as Mordecai the Jew and Queen Esther had decreed for them, and as they had established for themselves and their descendants in regard to their times of fasting and lamentation.

American Standard Version
to confirm these days of Purim in their appointed times, according as Mordecai the Jew and Esther the queen had enjoined them, and as they had ordained for themselves and for their seed, in the matter of the fastings and their cry.

Berean Study Bible
in order to confirm these days of Purim at their appointed time, just as Mordecai the Jew and Queen Esther had established them and had committed themselves and their descendants to the times of fasting and lamentation.

Douay-Rheims Bible
And observe the days of lots, and celebrate them with joy in their proper time: as Mardochai and Esther had appointed, and they undertook them to be observed by themselves and by their seed, fasts, and cries, and the days of lots,

English Revised Version
to confirm these days of Purim in their appointed times, according as Mordecai the Jew and Esther the queen had enjoined them, and as they had ordained for themselves and for their seed, in the matter of the fastings and their cry.

King James Bible
To confirm these days of Purim in their times appointed, according as Mordecai the Jew and Esther the queen had enjoined them, and as they had decreed for themselves and for their seed, the matters of the fastings and their cry.

World English Bible
to confirm these days of Purim in their appointed times, as Mordecai the Jew and Esther the queen had decreed, and as they had imposed upon themselves and their descendants, in the matter of the fastings and their cry.

Young's Literal Translation
to establish these days of Purim, in their seasons, as Mordecai the Jew hath established on them, and Esther the queen, and as they had established on themselves, and on their seed -- matters of the fastings, and of their cry.

Esther 9:31 Additional Translations ...