Pastor Mark Hogan teaches on the biblical foundation for Sunday worship, arguing that the Lord's Day is the Christian Sabbath—a positive, moral, and perpetual commandment rooted in the creation ordinance of Genesis 2:1-3, where God rested and sanctified the seventh day as a pattern for mankind. Citing Revelation 1:10 and Mark 2:27, he explains that this day was sovereignly changed to the first day of the week after Christ's resurrection, and Jesus affirmed the Sabbath was made for man, not man for the Sabbath. The one-in-seven pattern is embedded in the moral law (Exodus 20:8-11), making it binding for all ages, while the specific day changed from Saturday to Sunday, evidenced by New Testament practices (Acts 20:7, 1 Corinthians 16:1-2) and early church writings like the Didache and Justin Martyr. The term "Lord's Day" parallels the "Lord's Supper" (1 Corinthians 11:20) as something belonging to Christ, and the change is grounded in Christ's resurrection appearances on the first day (Matthew 28:1, John 20:19, 26), signifying a positive apostolic appointment that transforms the fourth commandment to commemorate new creation without abolishing its weekly rhythm. The application is that Christians must observe Sunday as a day of cessation from secular work and recreation, dedicated to public and private worship, refreshment, and doing good, continuing until Christ returns, and must ask how to sanctify and devote this day to God.