I'm using Office 365 Version 1709.
When I create a Pivot Chart with a single Date-value Category (x) axis, any changes I make to the axis label format are not reflected on the chart. For example, I would like it to only display date labels in "MMM-DD" format, and only every three months. However, even though I have the following settings on the Axis panel:
... the axis still looks like this: