'Of The Month' in the Bible

In the first month, on the fourteenth day of the month at nightfall, is the Lord's Passover;

Say to the children of Israel, In the seventh month, on the first day of the month, let there be a special day of rest for you, a day of memory, marked by the blowing of horns, a meeting for worship.

Let this be a Sabbath of special rest to you, and keep yourselves from all pleasure; on the ninth day of the month at nightfall from evening to evening, let this Sabbath be kept.