Minicalendar not synced with calendar

I am trying to add the mini-calendar to my application.
I have succesfully added a mini-calendar to the header of the planner (e.g. … the_header).
I have added another one in a separate view ( … he_planner), but when I change the date in the one in the header, changes are not synced with this one.

How I sync them? Every modify in one of them should affect the other one…

sorry for the delay in answerring. Extrernal calendar was designed as a tool to select calendar date outside scheduler. It doesn’t switch weeks/monthes when you change it in calendar.