Is it posible to center the Tplannercalendargroup on a panel?

With a Tplannercalendargroup: Is it possible to center the calender on the panel?

I'm not sure what you mean.
Center something inside the TPlannercalendargroup control? Or center this TPlannercalendargroup on its parent panel? Or something else?

I would like to center the TPlannercalendargroup control in the parent panel.

I suggest to use the classic Delphi VCL form techniques like anchoring.