Ganesha, the god of new beginnings, is celebrated as the son of Shiva and Parvati, whose origins involve tragic events leading to his distinctive elephant head. He symbolizes the removal of obstacles and is depicted with a mouse, representing the conquest of ego for wisdom. Ganesha's sacred day is the fourth day of the new moon, with his birthday festival, Ganesh Chaturthi, occurring in late August or early September, marked by various cultural celebrations.