Hide/Unhide Columns based upon Active X Combobox value

I am fairly new to VBA and coding but I have been really wanting to learn so I have taken on some projects that have challenged me to learn some new tricks. However, I have hit a stumbling block and I have a need to hide a particular set of rows based upon the selected value from an Active X ComboBox. I am using ComboBox2 and it is linked to cell V75. The values in the drop-down are the following: (January, February, March, April, May, June, July, August, September, October, November, December, Full Year). When the option is selected from the drop-down list I need the columns to be hidden as follows:

January = D:N
February = C, E:N
March = C:D, F:N
April = C:E, G:N
May = C:F, H:N
June = C:G, I:N
July = C:H, J:N
August = C:I, K:N
September = C:J, L:N
October = C:K, M:N
November = C:L, N
December = C:M
Full Year = all columns visible

Any help is greatly appreciated, thanks!!

Stephen

This might help:

Private Sub UserForm_Activate()

Worksheets("Sheet3").Columns("A:Z").EntireColumn.Hidden = False

With ComboBox1
.AddItem "January"
.AddItem "February"
.AddItem "March"
.AddItem "April"
.AddItem "May"
End With

End Sub

Private Sub CommandButton1_Click()

combo_value = ComboBox1.Value

month_ref1 = Array("January", "February", "March", "April", "May")
month_ref2 = Array("", "C:C", "C:D", "C:E", "C:F")
month_ref3 = Array("D:N", "E:N", "F:N", "G:N", "H:N")

For i = LBound(month_ref1) To UBound(month_ref1)
If month_ref1(i) = combo_value Then Exit For
Next i

If month_ref2(i) <> "" Then
Worksheets("Sheet3").Columns(month_ref2(i)).EntireColumn.Hidden = True
End If
Worksheets("Sheet3").Columns(month_ref3(i)).EntireColumn.Hidden = True

End Sub

Thank you both for your prompt replies. I went with stnkynts's solution and it worked well. The only thing I noticed is that the columns seemed to have some lag time when hiding multiple rows. Is there any remedy to this lag?

Maybe this one, but I am not sure:

Application.ScreenUpdating = False