Lord Ganesha cheerfully celebrates his birthday on the propitious occasion of Ganesha Chaturthi in Maharashtra, India. Normaly, the celebration of Ganesh Chaturthi is lasts for ten days but some people love to continue even for 21 days. Ganesh chaturthi probably is the only festival in Maharashtra which celebrated for 10 days. In Hindu mythology, Lord Ganesha is very important as no work is considered to be flourishing without his blessings, which is why, In the tradition of the right hand path importance is given to the first day and in the left hand path tradition, the final day looks more significant.
As far as reasons behind celebrating Ganesh Chaturthi, they are just endless. Out of all, the most momentous legend goes like this that once Mata Parvati asked his darling son Ganesh whom she created out of her sandalwood dough mostly used by her for bathing purpose and then breathed life into him. Once before going for a bath, she asked him to protect her by standing as a guard and when Lord Shiva came and asked him not to stop him, he continued to obey her mother's orders. But that infuriated Lord Shiv and he severed his head and finally entered. Such scene really disturbed her and she asked her husband to revive him, as a result of which he cut off elephant's head and again fixed it on the body of Ganesha.
Throughout these ten devotional days of Ganesh Chaturthi, Maharashtrians chant 'Ganapati Bappa Morya, Morya Re and makes this felicitous day look more electrifying by including lively and enthusiastic yet dedicated songs, dances and drum beats which are predominantly the part of processions featuring breathtaking idols of this lord of success. However, the last day of Chaturthi Chaturthi is Ganesha-Visarjan, i.e. immersing the idol in water, the entire festivity comes into an end with the hope to welcome the god with great love, respect and determination next year.