Sabbath

The Old Catholic Church celebrates the Eucharist on Sunday, the First Day of the week, commemorating Christ's resurrection. Sunday has been the Christian Sabbath since apostolic times (Acts 20:7; 1 Corinthians 16:2), fulfilling and transforming the Jewish Sabbath observance. The Old Testament Sabbath command is fulfilled in Christ and is not binding on New Covenant believers in its ceremonial form.

There is no Sabbatarianism or requirement for strict rest on Sunday. Believers may work, engage in necessary activities, and conduct business on Sunday while still honoring the day through participation in the Eucharist and prayer. The emphasis is on the Eucharistic celebration as the central act of Sunday worship, not on legal restrictions.

The church follows the liturgical calendar, with its seasons (Advent, Christmas, Epiphany, Lent, Easter, Pentecost) and holy days (saints' feasts). This liturgical rhythm reflects the church's understanding of time as sanctified through Christ's redemptive work. Sundays during Lent, for example, have special significance, yet believers are free in how they observe weekday practices. The regulation of Sunday work is a matter of Christian prudence and respect for community worship, not legal obligation.