Looking for the source of a Cardinal Ratzinger quote regarding the liturgy

Several years ago, I remember reading the statement of Cardinal Ratzinger in which the Cardinal stated (in essence) that he desired that those who use the Tridentine form of the Mass would use the Liturgical Calendar of 1969 as a sign of unity in the Latin Rite of the Catholic Church. Of course some special provisions would have to be set in place because of the differences between the two forms of the Mass. Does anyone know where I can find the source of this quote? I believe it was in a book(?) from the late 1990s or early 2000s and thus was prior to Cardinal Ratzinger becoming Pope Benedict XVI.