What year did the enforcement of the 18th Amendment to prohibit alcohol production begin?

The enforcement of the 18th Amendment, which instituted Prohibition in the United States, officially began in 1920. This amendment, ratified in 1919, prohibited the manufacture, sale, and transportation of intoxicating liquors. However, it wasn't until January 17, 1920, that the actual enforcement of the amendment took effect. Therefore, this year marks the beginning of the era of Prohibition, which lasted until the 21st Amendment repealed it in 1933. While 1918 and 1919 are important in the context of the amendment's ratification and the lead-up to Prohibition, they do not signify the start of its enforcement. The mention of 1933 pertains to the end of Prohibition rather than its beginning.