As you know prohibition is a law which prohibits alcohol. Typically, the manufacturing, transportation, import, export, and sale of alcoholic beverages is restricted or illegal. Don’t worry alcohol is legal in Costa Rica. You can buy it in almost everywhere and the legal drinking age is eighteen. However, on Good Thursday and Friday in Costa Rica stores cannot sell alcoholic beverages. The name of this two day prohibition is called La Ley Seca (The Dry Law). The law is in effect from 12:01 a.m. on Thursday until midnight on Friday. Seals are placed on the doors of liquor stores and the shelves where liquor is displayed in supermarkets are covered and sealed. By the way, until this year’s presidential election it was also against the law to sell alcohol on election day.

What Costa Ricans do is stock up on booze prior to Good Thursday, so it really doesn’t matter if liquor cannot be sold.
You can learn all about the ways things work in Costa Rica on one of my relocation/retirement tours which are like a continuous seminar.