Seventh-day Adventism is a sect of Christianity that believes, among other things, that worship services should be conducted on the “seventh day” (the Sabbath) instead of on Sunday. There seem to be different "degrees" of Seventh-day Adventism. Some Seventh-day Adventists believe identically to orthodox Christians, other than holding to the Saturday Sabbath. Other Adventists, however, go much further into aberrant doctrine.