'Fourteenth' in the Bible

In the fourteenth day of this month, at evening, you are to keep it at the regular time, and in the way ordered in the law.

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.

In the second month, on the fourteenth day, in the evening, they are to keep it, taking it with unleavened bread and bitter-tasting plants;

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