I thought you had me that time my friend,

"Isaiah 66:23 And it shall come to pass, that from one new moon to another, and from one sabbath to another, shall all flesh come to worship before me, saith the Lord"

But then I looked up the word "moon" in this text it's #2320 and it means "Month"

Rev. 22:2 In the midst of the street of it and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations.

So every Month, all nations will gather at the river to be as one people under the leaves of the tree of life.