参考
Dim d As Date = "2019-5-27"
Dim n As Integer = 5
Dim x, y As Integer
For i As Integer = 0 To n-1
If (d.day+i) Mod n = 0 Then
x = i
y = (d.day+i) \ n
Exit For
End If
Next
msgbox(x)
msgbox(y)
If x Mod 2 = 0 Then
x = x+y
msgbox("文本框" & x)
Else
If y > x Then
x = y-x
msgbox("文本框" & x)
ElseIf x > y Then
x = x-y
msgbox("文本框" & 13-x)
Else
msgbox("文本框1")
End If
End If