'Of The Month' in the Bible

So they kept the Passover in the first month, on the fourteenth day of the month, at evening, in the waste land of Sinai: as the Lord gave orders to Moses, so the children of Israel did.

And in the first month, on the fourteenth day of the month, is the Lord's Passover.

In the seventh month, on the first day of the month, let there be a holy meeting; on it you may do no field-work; let the day be marked by the blowing of horns;

And Aaron the priest went up into the mountain at the order of the Lord, and came to his death there, in the fortieth year after the children of Israel had come out of the land of Egypt, in the fifth month, on the first day of the month.