how do you show current day in week and day view

You can use DateTime.Today as DayPilotScheduler.StartDate. This will display today as the first day in the matrix.

If you want to show a full week and just set the initial scroll position to today, use the following:

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            DayPilotScheduler1.SetScrollX(DateTime.Today);
        }
    }