Apparently in response to the “May Day” celebrations for workers sponsored by Communists, Pius XII instituted the feast of St. Joseph the Worker in 1955. But the relationship between Joseph and the cause of workers has a much longer history.
In a constantly necessary effort to keep Jesus from being removed from ordinary human life, the Church has from the beginning proudly emphasized that Jesus was a carpenter, obviously trained by Joseph in both the satisfactions and the drudgery of that vocation. Humanity is like God not only in thinking and loving, but also in creating. Whether we make a table or a cathedral, we are called to bear fruit with our hands and mind, ultimately for the building up of the Body of Christ.