Unclean is more of a ceremonial thing, rather than meaning something is sinful.  “Cleanliness is next to godliness,” isn’t even in the Bible.

What is the Feast of Tabernacles?

-When the priests sacrificed on the Day of Atonement in the tabernacles-

-There is no such feast in Scripture.  It’s a church thing.-

-It’s basically Passover.-

-All of Israel gets out their tents and camps for a week in memory of the wilderness wanderings.-