Krishna Janmashtami, also known as Krishnashtami, Saatam Aatham, Gokulashtami, Ashtami Rohini, Srikrishna Jayanti, Sree Jayanthi or sometimes merely as Janmashtami, is a Hindu festival celebrating the birth of Krishna, an avatar of the god Vishnu. Krishna Janmashtami is observed on the Ashtami tithi, the eighth day of the dark half or Krishna Paksha of the month of Shraavana in the Hindu calendar, when the Rohini Nakshatra is ascendant. The festival always falls within mid August to mid September in the Gregorian calendar. Rasa lila, dramatic enactments of the life of Krishna, are a special feature in regions of Mathura and Vrindavan, and regions following Vaishnavism in Manipur. While the Rasa lila re creates the flirtatious aspects of Krishnas youthful days, the Dahi Handi celebrate Gods playful and mischievous side, where teams of young men form human pyramids to reach a high hanging pot of butter and break it. This tradition, also known as uriadi, is a major event in Tamil Nadu on Gokulashtami. Janmaashtami, popularly known in Mumbai and Pune as Dahi Handi, is celebrated with enormous zeal and enthusiasm. The handi is a clay pot filled with buttermilk that is positioned at a convenient height prior to the event. The topmost person on the human pyramid tries to break the handi by hitting it with a blunt object. Mostly nariyal (coconut) is preferred being a sign of purity, truth etc. in Hinduism. When that happens the buttermilk is spilled over the entire group, symbolizing their achievement through unity. Handis are set up around the city, and groups of youngsters, called Govinda Pathaks, travel around in trucks trying to break as many handis as possible during the day. Many such Govinda Pathaks compete with each other, especially for the handis that dole out hefty rewards. The event, in recent times, has gathered a political flavor, and it is common for political parties and rich community groups to offer prizes amounting to lakhs of rupees. Some of the most famous handis are at Dadar, Lower Parel, Worli, Mazgaon, Lalbaug, Thane and Babu Genu, Mandai in Pune. Cash and gifts are offered for Govinda troops to participate; for over 4,000 handis in Mumbai, 2,000 Govinda troops compete for the prizes.