Hanna-Maria Seppälä, Finnish freestyle swimmer

Hanna-Maria Hintsa is a retired Finnish freestyle swimmer, who won the world title in the 100 m freestyle at the 2003 World Aquatics Championships in Barcelona, Spain.

Freestyle is a category of swimming competition, defined by the rules of World Aquatics, in which competitors are subject to only a few limited restrictions on their swimming stroke. Freestyle races are the most common of all swimming competitions, with distances beginning with 50 meters and reaching 1,500 meters, also known as the mile. The term 'freestyle stroke' is sometimes used as a synonym for 'front crawl', as front crawl is the fastest surface swimming stroke. It is now the most common stroke used in freestyle competitions.

December 13 is the 347th day of the year in the Gregorian calendar; 18 days remain until the end of the year.