IFCA International teaches that Sunday is the Lord's Day and is observed as the Christian Sabbath in commemoration of Christ's resurrection. However, the IFCA adopts a dispensational hermeneutic that distinguishes between the Old Testament Mosaic Law (which was binding for Old Testament Israel under the old covenant) and the New Testament church (which lives under the new covenant through Christ).

In the dispensational framework, the Sabbath commandment is part of the Mosaic Law, which is no longer binding on the church. Christians are not required to observe a Sabbath day or to keep the ceremonial and judicial aspects of Old Testament law. The Fourth Commandment's underlying principle — the sanctification of time for worship — may be applied to the Lord's Day, but the Sabbath law is not binding. Believers may work on Sunday if called to do so, engage in reasonable recreation, and participate in necessary activities without violating biblical principle.

This reflects IFCA's emphasis on Christian liberty in matters not explicitly commanded for the church. Congregations may encourage Sunday worship and rest but do not impose Sabbath observance. The focus is on spiritual priorities and wholehearted devotion to God rather than legalistic adherence to Old Testament ceremonial practices.