Gateway of famous Bengal Festival Durga Puja is Mahalaya, which is celebrated seven days before the Durga Panchami Puja every year, and the day of Mahalaya never changes. Jago Tumi Jago - Mahisasur Mardini - Durga Maa Agomoni - Mahalaya is known for inviting goddess Durga to the earth. Mahalaya observed in Bengal through Tarpan, which is a process of giving water to the family members who are dead, and inviting Maa Durga, the Goddess of Power. It's nearly six decades from the creation of Mahalaya Stotra by Birendra Krishna Bhadra. Bengalese rise up around 4am in the morning and tuned to Radio to listen Mahisasur Mardini by Birendra Krishna Bhadra every year on Mahalaya. It's happening from 1930 when for the first time from Maa Chandi Kavya been translated to Mahisasur Mardini (English meaning The Annihilation of the Demon).
Mahalaya Stotra Ya Devi Sarba Bhuteshu & the Story of Mahisasura Mardini tells how Goddess Durga formed by Bramha, Bishnu and Maheshwar and how Maa Durga protects the Earth by killing cruel demon king Mahisasura.
If you are searching for Mahisasura Mardini Mahalaya Song of Birendra Krishna Bhadra, then please check out Mahalaya by Birendra Krishna Bhadra.