I have created a stacked bar chart from a SharePoint List View.
My dates show up as 1/1/1900 12:00 AM. I just want the month to show as JAN.
I've gone into Chart Areas > Axes > Primary X > Scale and set the sub Type to Date Time and Formatting to Fixed and set the Label format to MMM and nothing changes.
I've also tried setting the Label Angle and step mode set to a custom one month step to no avail.
Below is how I have it set up:

Hello Greg,
All expressions should start with the equal sign "="
You should update the expressions for the X value and the Label.

Let us know if this helps.

Best Regards,
Nevron Support Team