This document provides brief descriptions of various holidays celebrated around the world, including: Martin Luther King Jr. Day, Valentine's Day, St. Patrick's Day, Memorial Day, Passover, Flag Day, Patriot Day, Thanksgiving, Remembrance Day, Halloween, Boxing Day, and Hanukkah. For each, it gives some key details about the date it falls on, its origins and traditions, and how it is commemorated or celebrated in different places.