RadControls for ASP.NET AJAX RadCalendar does not apply week numbers according to the ISO standard by default. This is because the ASP.NET Framework itself does not. However, this can be configured easily at runtime:
CopyASPX
<form id="form2" runat="server">
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
</telerik:RadScriptManager>
<div>
<telerik:RadCalendar ID="RadCalendar1" runat="server" FirstDayOfWeek="Monday" />
</div>
</form>CopyC#
protected void Page_Load(object sender, EventArgs e)
{
System.Globalization.CultureInfo c = new System.Globalization.CultureInfo(RadCalendar1.CultureInfo.ToString());
c.DateTimeFormat.CalendarWeekRule = System.Globalization.CalendarWeekRule.FirstFourDayWeek;
RadCalendar1.CultureInfo = c;
}CopyVB.NET
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
Dim c As New System.Globalization.CultureInfo(RadCalendar1.CultureInfo.ToString())
c.DateTimeFormat.CalendarWeekRule = System.Globalization.CalendarWeekRule.FirstFourDayWeek
RadCalendar1.CultureInfo = c
End Sub