Kalaratri Saptami is observed on the seventh day during the waxing phase of moon in Ashwin month. Kalaratri Saptami 2017 date is September 27. It is observed on the seventh day of Navratri. Goddess Kalratri is worshipped on the day.
Goddess Kalaratri is the one of the fiercest forms of Durga and her appearance itself evokes fear.
Kalaratri is depicted as having four hands and her vehicle, or mount, is a donkey. She can curse and bless and is known to create havoc. This form primarily depicts that life also has a negative side – Tamas.
Tantric followers perform special puja on Kalaratri Saptami. Pujas are held during the night.
Kalaratri Saptami puja is held on Ashwin Shukla Paksha Saptami or the seventh day during the waxing phase of moon in Hindu lunar calendar.