Workaround: 

private void radScheduler1_CellFormatting(object sender, Telerik.WinControls.UI.SchedulerCellEventArgs e)
{
    if (e.CellElement is SchedulerHeaderCellElement && e.CellElement.Text == "Local")
    {
        e.CellElement.TextAlignment = ContentAlignment.BottomLeft;
    }
}