Set DayPilotCalendar.Days to 7. Page_Load method in Default.aspx.cs should look like this:
protected void Page_Load(object sender, EventArgs e)
{
blocks = new DataManager().GetBlocks();
if (!IsPostBack)
{
DayPilotCalendar1.StartDate = Week.FirstWorkingDayOfWeek(DayPilotNavigator1.SelectionStart);
DayPilotCalendar1.Days = 7;
DayPilotCalendar1.DataSource = new DataManager().GetAssignments(DayPilotCalendar1);
DayPilotCalendar1.DataBind();
}
}