When Federal Prohibition was rolled back in 1933, the majority of decisions on how to regulate alcohol were left to the states — including minimum drinking ages. By the end of the decade, all of the states had their laws on the books. Most opted to go with 21 — the age of “majority” — when you become an adult, though a few were a bit more adventurous. Mississippi on the other hand was quite regressive, prohibiting the sale of all alcohol on the state level until 1966.

Underneath the map, we’ve included some additional info explaining the major shifts, as well as a handful of exceptions.

Notes, Exceptions, Etc.