'Celebration' in the Bible

In every province and every city, wherever the king’s command and his law reached, joy and rejoicing took place among the Jews. There was a celebration and a holiday. And many of the ethnic groups of the land professed themselves to be Jews because fear of the Jews had overcome them.

the Jewish people established this celebration, making it a tradition for themselves, for their descendants, and for all who joined with them that they should not fail to observe these two days each year, based on the written instructions, and at the prescribed time.