Data pulling from Combo box is for a specific date, not a Month rollup

[SouthernAngel]

I am needing assistance with adjusting my combo box to allow the data to update based on the month selected. Currently, it is only pulling data for the day (i.e. if "October" is selected, it is only pulling "10/1/2018")

To start, I have a VBA code below. It inputs data from a spreadsheet into the Data tab on the workbook attached. The VBA code is setup to have the date entered as "mmmm-yyyy" but when inputting on the Data tab, it displays as "October-2018", however it is formatted to input the day the data was entered from another spreadsheet.

On the Overview tab, when October is selected, the idea is to update all the data based on that selectin, however it is only pulling that specific day.
NOTE: I am using October because there were three days of input

How do I setup my Data Validation list to incorporate the month of October?

Sub CopyData()

   Dim i As Long
   Dim Rng As Range
   Dim Iws As Worksheet, Rws As Worksheet
   
   Set Iws = Sheets("Input")
   Set Rws = Sheets("AuditData")
   For i = 3 To 11
      For Each Rng In Iws.Cells(4, i).Resize(21).SpecialCells(xlConstants).Areas
         With Rws.Range("D" & Rows.Count).End(xlUp).Offset(1)
            .Value = Rng.Offset(, -i + 1).Value
            .Offset(, -3).Resize(, 3).Value = Array(Date, Application.UserName, Iws.Range("J1").Value)
            .Offset(, -3).NumberFormat = "mmmm-yyyy"
            .Offset(, 1).Value = Iws.Cells(3, i).Value
            .Offset(, 2).Resize(, Rng.Count).Value = Application.Transpose(Rng.Value)
            .Offset(, 6).FormulaR1C1 = "=AVERAGE(rc6:rc9)"
         End With
      Next Rng
   Next i
         
End Sub

 

[Puertorekinsam]

If you want the date to really only be "October" and not the day it was entered you could try something like this:

.Offset(, -3) = .Offset(, -3) - Day(.Offset(, -3)) + 1

this says take the date in the field, subtract the number of days in the date, (which will put it on the last day of the previous month) and then add 1 to get back to the first of the month.