Custom header of CalendarProvider is error

[gshoanganh]

I've tried many different ways, but it seems like the Theme of CalendarProvider has no effect at all. Could someone please help me hide its header?
my source code:

<View style={{ height: 130, }}>
            <CalendarProvider
                date={Date()}
                theme={{
                    'stylesheet.calendar.header': {
                        header: {
                            height: 0,
                        },
                    }
                }}>
                <WeekCalendar hideKnob={true} />
            </CalendarProvider>
        </View>