I just studying Leviticus again. This book just leaves me with a holy awe each time. I am at the feast of the Lord: God's appointed time when we are to gather in holy assembly for worship.
These feast are eternal. The gentiles nations that won't celebrate them will have no rain in their land. Israel will be celebrating them in the earthy jerusalem. And the church will be celebrating them in the heavenly jerusalem. The two jerusalem is the same and one reality. One is earthly the other heavenly.
In Revelation ,we see the saints on the great sea of glass , its the place of corporate worship, joining with the earthly jerusalem to celebrate God's appointed time.