'Fourteenth' in the Bible

In the fourteenth day of this month, at even, ye shall keep it in his appointed season: according to all the rites of it, and according to all the ceremonies thereof, shall ye keep it.

And they kept the passover on the fourteenth day of the first month at even in the wilderness of Sinai: according to all that the LORD commanded Moses, so did the children of Israel.

The fourteenth day of the second month at even they shall keep it, and eat it with unleavened bread and bitter herbs.

And in the fourteenth day of the first month is the passover of the LORD.