When did pre-Vatican II Catholics put up Christmas decorations? Christmas Eve?
Francis X. Weiser, S.J.,
Religious Customs in the Family: The Radiation of the Liturgy into Catholic Homes (1956), pt. 2, ch. 10:
Since it is not possible to stop the abuses which commercialism has introduced (unless enough parents protest), you can only try to protect your family from this harmful influence. As far as possible, do not let your children listen to Christmas music and Christmas programs in Advent. Do not take them to see the displays in department stores except perhaps during the last few days before the feast. Do not allow them to go to Christmas parties long before December 25. (This abuse is sometimes practiced even in Catholic schools and organizations.) Do not decorate your home before Christmas Eve.