Catechism of the Catholic Church §2194 — excerpt
The institution of Sunday helps all "to be allowed sufficient rest and leisure to cultivate their amilial, cultural, social, and religious lives" (GS 67 # 3).
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.