How do I pull the current month for use in pivot table start date?

I am having trouble starting my pivot table data from the first of the current month. The "Now" function is too specific. I also have tried Month(now) but that doesn't work. Here is what i have:

PT.PivotFields("DueDate").LabelRange.Group _
    Start:=Now, End:=True, Periods:=Array(False, False, False, _
        False, True, False, True)