Ganesha Chaturthi, also known as Vinayaka Chaturthi, is the Hindu festival of Ganesha, son of Shiva and Parvati, who is believed to bestow his presence on earth for all his devotees in the duration of this festival. It is the birthday of Lord Ganesha who is widely worshiped as the god of wisdom, prosperity and good fortune. The festival is observed in the Hindu calendar month of Bhaadrapada, starting on the shukla chaturthi (fourth day of the waxing moon period). The date usually falls between 20 August and 15 September. The festival lasts for 10 days, ending on Anant Chaturdashi (fourteenth day of the waxing moon period).While celebrated all over India, it is most elaborate in Maharashtra, Goa, Gujarat, Karnataka, Tamil Nadu and Andhra Pradesh. Outside India, it is celebrated widely in Nepal and Tamil Hindus in Sri Lanka.
Rituals on Ganesha Chaturthi
Ganesh Chaturthi starts with the installation of these Ganesh statues in colorfully decorated homes and specially erected temporary structures mandapas (pandals) in every locality. The priest, usually clad in red silk dhoti and shawl, then symbolically invokes life into the statue by chanting mantras. This ritual is the Prana pratishtha. After this the ritual called as Shodashopachara (16 ways of paying tribute) follows. Coconut, jaggery, 21 modakas, 21 durva (trefoil) blades of grass and red flowers are offered. The statue is anointed with red balm, typically made of Kumkum & Sandalwood paste . Throughout the ceremony, Vedic hymns from the Rig Veda, the Ganapati Atharva Shirsha Upanishad, and the Ganesha stotra from the Narada Purana are chanted.
For 10 days, from Bhadrapad Shudh Chaturthi to the Ananta Chaturdashi, Ganesha is worshipped. On the 11th day, the statue is taken through the streets in a procession accompanied with dancing, singing, and fanfare to be immersed in a river or the sea symbolizing a ritual see-off of the Lord. This is the ritual known as Ganesh Visarjan. At individual homes the Visarjan is also done on 3rd, 5th or 7th day as per the family tradition. The main sweet dish during the festival is the modak (modagam or modakam in South India).
Today, the Ganesh Festival is not only a popular festival; it has become a very critical and important economic activity for Maharashtra. Many artists, industries, and businesses survive on this mega-event. Ganesh Festival also provides a stage for budding artists to present their art to the public. The same holds true for Hyderabad and Chennai too.

Jay shri Ganesh, Parvathi Sankara he Paramesa