Alcohol law is a set of laws and regulations governing the production, sale, and consumption of alcoholic beverages. These laws vary widely from country to country and even within countries. In some countries, alcohol is completely prohibited, while in others it is legal but heavily regulated. In many countries, the legal drinking age is set at 18 or 21. Alcohol laws also regulate the hours and days of the week when alcohol can be sold, as well as the types of establishments that can sell it.