This document summarizes common holidays celebrated in the USA, UK, and Spain. Some holidays celebrated across countries include Christmas on December 25th and New Year's Eve/Day. The UK additionally celebrates May Day on May 1st, Boxing Day on December 26th, and late summer and spring bank holidays at the end of May and August. The US celebrates Martin Luther King Jr. Day in January, Presidents' Day in February, Memorial Day in May, Independence Day on July 4th, Labor Day in September, Halloween on October 31st, and Thanksgiving on the last Thursday of November.