Valluvar year, also known as the Thiruvalluvar year, is an officially recognized Tamil calendar system for use in Tamil Nadu. It is calculated on the basis of the supposed year of birth of the Tamil poet-philosopher Valluvar. When comparing it with the widely used Gregorian calendar, Thiruvalluvar year will have an additional 31 years.[1] For instance, the year 2024 in Gregorian calendar way is 2055 in the Thiruvalluvar year.