I have Excel 2016 through Office 365 Business. I have many workbooks that I load data into PowerPivot and then create dynamic PowerPivot charts that can be updated on the back end through the PowerPivot connections.
My problem is that when I create Pivot Charts with the date as the x-axis, I cannot change the format of the date values from M/D/YYYY. I have tried formatting them first in PowerPivot (which changes them appropriately in the data model), changing them in the Format Axis pane on the far right (it will allow me to change the format to another date format, but the changes don't take effect on the displayed chart), and I've tried to change the format using the variable field settings in the Pivot Table field list pane (but my problem there is that the "format" button in the bottom left corner of the Field Settings window doesn't exist in my window like it does for all the other number values).
Why I can't I format the dates???????