Is your Church doing anything to celebrate the 40th anniversary (July 25, 1968) of Humanae Vitae? What are you doing? I would like to propose something to do at my Church.
It reaffirms the constant Christian teaching/Tradition (until 1930 with the Church of England, but constant in the Catholic Church) that using contraception is a mortal sin. Read this at First Things to learn some more about the Papal encyclical, Protestant reaffirmation of the Tradition, and the "The Vindication of Humanae Vitae".