well i have an answer, using renderer
public
class
WeekCalendarRenderer : CalendarRenderer
{
protected
override
void
OnElementChanged (ElementChangedEventArgs<RadCalendar> e)
{
base
.OnElementChanged(e);
if
(Control?.Calendar !=
null
&& Element !=
null
)
{
NSCalendar calendar =
new
NSCalendar(NSCalendarType.Gregorian);
calendar.Locale = NSLocale.CurrentLocale;
this
.Control.Calendar = calendar;
}
}
}