Today, 16 July, Aadi masam 2012 or Aadi month in Tamil calendar begins. Aadi masam ends on August 16. It begins on Karkataka Sankranti or on the day of Sun’s transition into Karkataka rashi (Cancer zodiac) from Mithuna Rashi (Gemini zodiac). Aadi masam is an inauspicious month as per the Tamil Astrology and religious history as no auspicious functions such as marriage, gruhapravesam, Upanayanam, etc.. are held in this month.
Aadi Karthigai, Aadi Pooram, Aadi Perukku, and Aadi Amavasai are the major festivals celebrated in Aadi month of Tamil Nadu.
Read here about the significance, importance, fears, myths, doubts about Aadi masam.