Plot count of two different date sets on a single date axis

[cesar2d]

Hello everyone! I'm with this following trouble in a dashboard.

I have a table that contains collumuns for the entrance date and the conclude date, like the image bellow. But the entrance date is connected to a callendar table because I need other date formats in my dashboard.

I want to plot a chart that contains the count of this two diffrent dates on a single date axis.  I've already tried to relate the conclude date to my calendar table and use the formula userelationship but when I do that, my hierarchy of the conclude date (that I also need) does not work anymore. Is there another option that could make it work?