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Both RadCalendar and RadDatePicker support only cultures based on the Gregorian calendar. Unfortunately, due to the complexity of the controls there is no workaround that could allow you to display Hijri calendar.
The only available workaround is for the exception you get when you set CultureInfo=”ar-SA”, but you will still get the Gregorian calendar to display. Here is the code:
sender, EventArgs e)
var culture =
.radCalendar.CultureInfo = culture;
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