Basanti Puja, or Vasant Durga Puja, is observed during the Chaitra Navratri. In 2013, Basanti Puja is on April 17 and will end on April 19. There is a popular belief that Goddess Durga was mainly worshipped during the Basant or Spring Season. But it was Lord Rama who changed the Durga Puja period. Lord Ram wanted the blessings of Goddess Durga to defeat Ravana therefore he invoked Goddess Durga during Ashwin (October – November).
Nowadays, the Vasant Durga Puja, or Basanti Puja, is not a major festival. Therefore all the rituals associated with the Ashwin month Durga Puja are not performed in the Chaitra month.
The Durga Puja in Ashwin month is also known as Akal Bodhon, or untimely invocation, as Lord Ram had invoked her during the Ashwin month.
Basanti Puja is held during the last four days of Vasant Navratri. Some of the rituals followed in Bengal during Durga Puja are followed in
North India during the Vasant Durga Puja – like worship of Girl child and Ghatsthapana.