National Boston Day is celebrated annually on January 16 to honor the unique name of Boston, the capital and largest city of Massachusetts. The name "Boston" is believed to have Middle English origins and is derived from a small port town in Lincolnshire, England, which was named after St. Botolph, a 7th-century English saint. The city was originally called Trimount due to its geography, characterized by three prominent hills, before being renamed by the Massachusetts Bay colonists. Typical customs for observing this day may include appreciation for the city's history and cultural significance, as well as recognition of its role in American history, such as its involvement in the American Revolution.