Here's a treat. I'm sharing some excellent talks I downloaded years ago about the Old Testament sabbaths and holy days -- Israel's liturgical calendar -- from a Christian (i.e., Catholic) perspective.
I just re-listened to the one about the Feast of Tabernacles since I have friends who are observing it right now.
It's so exciting to explore the richness of these feasts in the light of Jesus Christ, who fulfilled them beautifully.
It's still the best "feast sermon" I've ever heard. If you've ever observed or wondered about the FOT (or others), listen to this!