Hi Sheth, thank you for the solution, it works for me !
But can i change de date format to be dd/mm/yyyy ?

Hi  Emilio Ros,

you can print whole format on Employees CV via edit source code of that report.

1. Open the Studio and select that report
2. Click On Edit Source button 
3.  
4. Now select the below report from the dropdown option as attahced screenshot below (report_employee_cv_main_panel (hr_skills.report_employee_cv_main_panel)

6. Remove " .year" as highlighted in above image for the start and end date so that will print whole format as per your Odoo system settings.

7.  

I hope this solution will work for you.

Best Regards,
Sunny Sheth (shethsunny555@gmail.com)