OnGetDateColor
Occurs when background of single day is painted.property OnGetDateColor: TNxGetDateColor read FOnGetDateColor write FOnGetDateColor;Example:
procedure TForm1.NxDatePicker61GetDateColor(Sender: TObject; Date: TDateTime;
var DayColor: TColor);
begin
if Date < Today then
begin
DayColor := clSilver;
end;
end;