Blue law

A blue law, in the United States and Canada, is a type of law designed to enforce moral standards, particularly the observance of Sunday as a day of worship or rest. Most have been repealed or are simply unenforced, although prohibitions on the sale of alcoholic beverages, and occasionally almost all commerce, on Sundays are still enforced in many areas. Blue laws often prohibit an activity only during certain hours and there are usually exceptions to the prohibition of commerce, like grocery and drug stores. In some places blue laws may be enforced due to religious principles, but others are retained as a matter of tradition or out of convenience.

In the Cook Islands, blue laws were first written legislation, enacted by the London Missionary Society in 1827, with the consent of ariki (chiefs). In Tonga, the Vava'u Code (1839) was inspired by Methodist missionary teachings, and was a form of blue law. In Niue, certain activities remain forbidden on Sunday, reflecting the country's strong Christian heritage.