In Peter Geiermann's The Convert's Catechism of Catholic Doctrine
, this transition is framed not as a dismissal of the Sabbath's holiness, but as a deliberate "transfer of solemnity" enacted by the Catholic Church. The Historical Context
Historically, the Sabbath (Saturday) was the biblically mandated day of rest for the Jewish people. However, the early Christian community began to prioritize the "first day of the week"—the day of Christ's Resurrection—as the primary time for communal worship. According to the