Kali Chaudas (Kali Choudash Puja) is observed on the 14th day in Ashwin month mainly in Gujarat. In 2017, Kali Chaudas date is October 18. This is the second day of Diwali festival.
It is observed on the day before Diwali and the day after Dhanteras. Goddess Kali is worshipped on Kali Chaudas day. Diwali is observed as Kali Puja in Bengal.
Kali Chaudas is also known as Kal Chaturdashi. There are many legends or stories are associated with Kali Choudas. It is believed that on this day, Goddess Mahakali or Shakti demolished demon Raktavija. Special recipe called Pova or Poha is made and offered as naivedya to the Goddess and distributed among devoptees.
Hanuman Puja and Kul Devi Puja are also performed on this day. Devotees believe that on this festival, Lord Hanuman was granted with some very special boons like Chirayu (everlasting life). Since then Hanuman is called as Chiranjeevi.
Kali Chaudas falls on Narak Chaturdasi or Choti Diwali day. This festival is observed as Roop Chaudas in Rajasthan. Roop Chaudas puja is done mainly by women to gain beauty or to enhance their beauty.