Kali Puja, also known as Shyama Puja is a festival, originating from the Indian subcontinent, dedicated to the Hindu goddess Kali, celebrated on the new moon day (Dipannita Amavasya) of the Hindu month Kartik .

Likewise, Sri Sri Karunamoyee Kali Temple celebrates Kali Puja every year as the Foundation Day.

The first Kalpataru Day, 1 January 1886, was "an event of unusual consequence and meaning" in the life of Ramakrishna and his followers. Ramakrishna was suffering from throat cancer at that time, and his health was declining. At that time, Sri Ramakrishna said to his .” What more shall I say? May you be awakened”. From that day every year January 1 is observed as Kalpataru Utsav and also being celebrated in Sri Sri Karunamoyee Kali Temple every year.