Jagran is a word that will be quite familiar to the Hindus worldwide. Its an all night worship of Mother Goddess who rides the Lion (Maa Durga), where Her devotees worship Her all night by singing Her praises and Her prayers, normally led by a single person along with some supporters who acts as a lead in the singing of prayers.
Usually this holy event is organised by a person or a family who bears all the cost of the holy event, but sometimes people organise a jagran by collecting charities to pay for the holy event.
This is a holy event that can be held any time of the year. The jagran 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 Jagran gives the final offering (antim-ardaas) to the Mother Goddess, and the rest of the devotees follow after that person/family.