Nimba Saptami Vrat is observed on the seventh day of Shukla Paksha (bright phase) of Margashirsha Month. In 2013, Nimba Saptami date is December 8.
On Nimba Saptami day, Neem Tree is worshipped. Literally, ‘Nimba’ means the Neem tree. The botanical name of Neem Tree is Azadirachta indica.
Neem tree is widely used in preparation of herbal medicine. This festival signifies how much importance or significance is given to trees and environment in Hinduism and Hindu tradition.
Nimba Saptami is also celebrated as Vishnu Saptami, Mitra Saptami, Bhadraa Saptami, Nanda Saptami, etc..