Sabbatarians, persons who insist upon strict observance of Sunday as the Sabbath. Societies promoting Sabbatarian objectives include the Lord's Day Alliance of the United States and the Lord's Day Observance Society in England. In the United States, Sabbatarian laws, known as blue laws, which bar certain business and sporting activities on Sunday, are still effective in many states and localities. The term is also applied to those who observe the seventh day (Saturday) as the Sabbath, such as certain Adventists and the Seventh-Day Baptists.