It is because they celebrate more things like other continents in Latin America such as the day of the "Los Reyes magos" and that is like at Christmas time
Another important day, is La Candelaria 'the Candles' or Virgen de la Candelaria 'Virgin of Lights or Candles' (this is also known as Candlemas in other countries around the world) on the 2nd February and it marks the end of the Mexican Christmas celebrations.