'Seventh' in the Bible

So on the first day of the seventh month, Ezra the priest brought out the Law before the assembled people. Both men and women were in attendance, as well as all who could understand what they were hearing.

They found written in the Law that the LORD had commanded through Moses that the Israelis were to live in tents during the festival scheduled for the seventh month.

As for the people of the land who bring merchandise or grain to sell on the Sabbath day, we will not buy from them on the Sabbath or on any holy day. We will forego planting crops, and we will cancel debts during every seventh year."