Use dates as x-axis on columnchart

[janstieler]

Hi,
I don't understand how I can use dates on columncharts for the x-axis.
My data looks like
[{"fillColor":"#95C11F","id":"0","strokeColor":"#95C11F","x":"Category A","y":"10"},{"fillColor":"#CAA93E","id":"1","strokeColor":"#95C11F","x":"Category B","y":"18"},{"fillColor":"#2E99FA","id":"2","strokeColor":"#0660B4","x":"Category C","y":"13"}]}]
Its based on the a basic data chart because its testdata.

Can someone give me a hint?

Cheers