How to change dynamically the column headers (name of months) depending of sysdate in Apex IR?

I want to change the headers in my Interactive Report depending of actually date (sysdate). For example, today one header (actually month) should be called “July”, and the next one “August”, etc. In a month, the first header (current month) should be called “August” and the another one “September”, etc.

How is possible to do it?

Thanks