Getting The Next Saturday and Listing Each Saturday For Past 30 Days

I'm trying to get the next Saturday. I have a drop down box which has every Saturday in it for the last 30 days plus the next Saturday. It's duplicating today and should show 2-10-2018. Please help as this is causing a lot of issues and for the life of me I'm not understanding dates. Here is what I have:
Dim nextSaturday As Date = Date.Today.AddDays(DayOfWeek.Saturday - Date.Today.DayOfWeek)
            rng.Add(nextSaturday.ToString("MM-dd-yyyy"))
            Return rng

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Trent AdamsDevOps LeadAsked:
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Gustav BrockCIOCommented:
You can use:

Dim nextSaturday As Date = Date.Today.AddDays(1 + (7 - 1 + DayOfWeek.Saturday - Date.Today.DayOfWeek) Mod 7)

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Gustav BrockCIOCommented:
Solution provided.
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