Mithuna Sankranti is the day when Sun transits into Mithun Rasi (Gemini zodiac) from Taurus zodiac or Vrushabha Rasi. Mithuna Sankranti generally falls in mid-June. Mithuna Sankranti is also known as Raja Sankranti in Orissa. It is celebrated with gusto for four days. Mithuna Sankramana marks the beginning of Tamil month of Aani and Malayalam month of Mithunam. Bengali month Aashar also begins on the day after Mithuna Sankranti. This is also referred to as Ashad Sankranti.