Why I used mycalendar..Culture = new System.Globalization.CultureInfo("it-IT"); won't change the tool tip "open the calendar popup" from English to Italian?
The CultureInfo property of the RadCalendar control and the Culture property of the RadDatePicker, RadTimePicker, and RadDateTimePicker controls determine the strings that are used as the names of months and days. However, the CultureInfo property does not translate the other strings that appear in these controls.