Step 1 : Introduction to the question "What is the biggest drinking night in the U.S. each year?"
...Almost everyone in the U.S. workforce gets time off for Thanksgiving. This is one of the contributing factors to the night before Thanksgiving, or Thanksgiving Eve, ranking as the biggest drinking night of the year in America. Bar owners know this to be one of the most favorable times for business. Thanksgiving is a time when friends and family get together, usually spending time catching up on the night before their Thanksgiving feast. Since most don't have to work or attend college classes on Thanksgiving Day, they feel free to have a few drinks and relax the night before. Source: Reference.com