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, Bharadhvaja, Vishvamitra, Gauthama, Jamadagni and Vashishta. In some parts of Kerala the day is also observed as Vishwakarma Puja.
Nepali Hindu women are observing the Rishi Panchami, the last day of Teej festival, worshipping the Saptarshis– the seven saints– as mentioned in scriptures.
On the occasion, women take a bath and carry out rituals for forgiveness for the offences they knowingly or unknowingly made during menstruation for the the past one year. They brush their teeth for 360 times with stalks of Datiun (Achyranthes species) as a part of the ritual. Clad in red attire, women set up the Saptarshis and worship them.
Sources: The Himalayan Times