How can i change day label header Xamarin ?

[seifselmi]

Hello,
I'm starting to use FSCalendar for Xamarin and i'm finding problems with changing the weekdays labels, i tried using this command 'calendar.CalendarWeekdayView.WeekdayLabels[1].Text = "Hello"; ' but with no success the labels are the same. Can anyone help me and give me the steps or example to change this ? Thanks.