Seventh-day Adventism is a belief system that focuses on the second coming of Jesus Christ. This religious group has synonyms such as Adventism, Sabbatarianism, and Adventist movement or church. Adventism is a biblical prophetic-centered movement/tradition that originated in 19th century America. It emphasizes the belief in the return of Jesus Christ and the importance of following the Ten Commandments, especially the observance of the seventh-day Sabbath. The Sabbath is a reminder of creation and is considered a day of rest, worship, and reflection. The Adventist movement has millions of members worldwide. Some other synonyms for Seventh-day Adventism include Millerism, Great Disappointment, and Advent Christian.