Combo Box Format For Date MMMYY

I have a cell using datavalidation. I would like the zoom of the spreadsheet to be 60% but this makes the validation box very tiny. I know that there is no way to format a validation bax -

So, I used code found at [url]
to create a combobox over the datavalidation cell.

Now I cannot figure out how to format the combobox for date format MMMYY.

Well, that and adding the code to the tab rather than with the rest of my macros - seems to break my other macros.