WTC cleared 321 to 921 is 666 months

World Trade Center field cleared SPRING EQUINOX
666 months later FALL EQUINOX
55*6 = 330

On March 1965, the Port Authority began acquiring property at the World Trade Center site. The Ajax Wrecking and Lumber Corporation was hired for the demolition work, which began on

            March 21, 1965 to clear the site for construction of the World Trade Center.  

                                            Equinox to equinox 666 months