The opening verse of Chapter 20 gives us a turning point in the progress of Israel on its way to the promised land. The “Desert of Zin” plays a role in several of the narratives in the Book of Numbers, and back in Chapter 13:21, when the spies are exploring the promised land, “Zin” is used as the starting point of the mapping of the promised land, indicating it is the southern border of territory that is the “promised land.” This means at the opening of Chapter 20, the Israelites are on the cusp of moving into the next phase of the operation. We haven’t gotten to Chapter 33 yet, but there it says that the Lord had commanded Moses to list “the stages in their journey.” (33:2). By taking the specifics laid out in Chapter 33 and referencing the story as it plays out throughout Exodus, Leviticus, and Numbers, we can logically determine that the events in Chapter 20 take place during the 40th and final year of Israel’s wandering.