Radcalendar having different weekend like (friday,saturday)

Problem: How can we make different weekends like Friday and Saturday in RadCalender ?
Solution: There are two ways,
1) You can do in source of Page like

<telerik:RadCalendar ID="RadCalendar1" Runat="server" FirstDayOfWeek="Thursday">
</telerik:RadCalendar>

Here you can see that Thursday became the first day of week.

2) You can set the RadCalendar FirstDayOfWeek property on Page_Load based on the parameter you have.

Example:

Dim instance As RadCalendar
Dim value As FirstDayOfWeek

instance.FirstDayOfWeek = value

value = instance.FirstDayOfWeek