Sunday. On Sunday they are not to work (even around the house), shop, go to the movies, or engage in sports. They are to attend church meetings, rest, visit with family or the sick, and read inspirational literature. "Because the Sabbath is a holy day, it should be reserved for worthy and holy activities. Abstaining from work and recreation is not enough. In fact, those who merely lounge about doing nothing on the Sabbath fail to keep the day holy." (True to the Faith, p. 146)
Biblical Christianity teaches that the Sabbath pointed to Christ. When he came, the purpose of the Sabbath ended (Colossians 2:16-17). God did not establish a new set of rules to govern our worship, or set apart a specific day of the week for worship.