first zodiac sign) as per Indian astrological calculations and astronomically represents the vernal equinox. "Vishu" in Sanskrit means "equal". Therefore Vishu is more probably denoting one of the equinox days. Although Vishu (first of Medam) is the astrological new year day of Kerala, the official Malayalam new year falls on the first month of Chingam (August - September). However, 1st of Chingam has no significance either astrologically or astronomically. Chingam is the harvest season in Kerala and southern parts of coastal Karnataka.
The festival of Vishu is celebrated with joy and mirth on the first day of Malayalese month of Medam. This corresponds to the month of April-May according to Gregorian calendar. The occasion holds a lot of significance for Hindus as Vishu marks the Astronomical New Year Day. The traditional people of Kerala practice a lot of colorful rituals and customs on Vishu. Most of these traditions are based on a belief that Vishu must be celebrated well as the good things of the first day of the New Year will continue for the rest of the year too.
Vishu is celebrated in the State Kerala on the same day is also celebrated as New year in several other parts of India such as Punjab (Baisakhi), Assam (Bihu), Tulu Nadu region in Karnataka where it is known as Bisu as well as in Tamil Nadu and Ugadi in(Andhra Pradesh).
The most important event in Vishu is the Vishukani, which literally "the first to be seen on the VIshu day." The Vishukkani consist of a ritual arrangement of auspicious articles like raw rice, fresh linen, golden cucumber, betel leaves, arecanut, metal mirror, the yellow flowers konna, jackfruit and a holy text and coins in a bell metal vessel called uruli in the puja room of the House. A lighted bell metal lamp called nilavilakku is also placed alongside. The arrangemnt is completed the previous night. On the day of VIshu, the custome is to wake up at dawn and go to the puja room with the eyes closed so that the Vishukkani is the first sight of the new season. Since the occasion marks the beginning of Malayalam New Year, it is also considered asuspicious to read verses from Hindu Holy book Ramayanam after seeing the Vishukkani.