太陰暦
Rishi Panchami is the fifth day, the next day after Ganesh Chaturthi day in Bhadrapad month of the Lunar calendar. It is a traditional worship of Sapta Rishi. The seven sages – Kashyapa, Atri, Bharadwaja, Vishvamitra, Gautama Maharishi, Jamadagni and Vashishtha. In some parts of Kerala the day is also observed as Vishwakarma Puja.