Charak Puja or Neel Pooja, also known as Hajrha Puja, is observed in mainly in Bengal and Bangladesh on the last day of Bengali Chaitra month. Charak Pooja day is also popular as Chaitra Songkranti. Charak Puja 2018 date is April 14. In some places, Neel Puja is performed on April 13, 2018.
This puja is dedicated to Lord Shiva. Devotees celebrate this festival to satisfy or please Lord Shiva in order to be blessed with happiness and prosperity.
A group of people from villages go to other villages to collect the necessary items like paddy, oil, sugar, salt, honey, money and other material with the arranged cosmetics like Shiva, Parvati, and Narod. The cosmetic Shiva is termed as ‘Neel Pagol or ‘Jal Katha. Devotees worship Lord Shiva throughout the night and distribute Prasod.
Next day to Charak Puja is celebrated as Poila Baisakh or Bengali New Year or Nabo Barsha in Bengal.