Naming your folders with literal months makes things difficult. Consider that Feb, Apr, Aug, and Dec will all sort before Jan. Presumably not what you want.
With script of course you have other options.
Dim arrdsn()
Dim arrdate()
Const fld = "c:\My Folder"
Set fso = CreateObject("Scripting.FileSystemObject")
Set f = fso.GetFolder(fld)
Set fc = f.Subfolders
For Each fs in fc
ReDim Preserve arrdsn(i)
ReDim Preserve arrdate(i)
arrdsn(i) = fs.name
arrdate(i) = fs.DateCreated
i = i + 1
Next
For i = UBound(arrDate) - 1 To 0 Step -1
For j = 0 to i
If arrDate(j) < arrDate(j+1) then
tmpDate = arrDate(j+1)
tmpDsn = arrDsn(j+1)
arrDate(j+1) = arrDate(j)
arrDsn(j+1) = arrDsn(j)
arrDate(j) = tmpDate
arrDsn(j) = tmpDsn
End if
Next
Next
For i = 2 to UBound(arrdsn)
fso.DeleteFolder fld & "\" & arrdsn(i), True
Next
You may want to substitute a WScript.Echo in place of the fso.DeleteFolder statement to get an idea of what will be deleted before going live with this.
Good luck. 8-)