Date format change when using Series() function

I’m using the Series() function with graphs, and the name ranges within the
graphs seem to work, however, the X axis date range now goes weird on me.
The named range for my X axis looked fine before, but when I put the name
range in the Series, the dates are now all wrong (1/1/1900, 2/1/1900, etc).
Any thoughts?

Thank you.