Jāgran( जागरण ) or jāgrata ( जागरता ) is a Hindu religious holiday consisting of all night worship of the mother goddess Durga,1 where her devotees worship her all night by singing her praises and her prayers, normally led by a single person along with a chorus who acts as a lead in the singing of prayers.
Usually this holy event is organized by a person or a family who bears all the cost, but sometimes people organise a jāgran by collecting charities to pay for the holy event.2
This is a holy event that can be held any time of the year. The jāgran starts with an invocation mantra of Ganesh-worship3 and ends with the lead singer (usually a priest) telling the story of Taramati (Tararani Ki Katha) and her devotion to the Mother Goddess. Then the person/family who organised the Jāgran gives the final offering(antim-ardaas) to the Mother Goddess, and the rest of the devotees follow.
Then everyone is given the prasad of halwa & cooked (salted) gram. Usually it's recommended to have the halwa made in pure ghee but because of the rising cost of it, it's dependent on the financial status of those organising the jāgran.4
In Goa there is a ritual in a number of villages called the Jagor.5