Shani Amavasya puja is observed on Amavasya or No Moon which falls on Amavasya. In June 2010, Jyeshta Amavasya (in North Indian Hindi calendars) (12th June 2010) is Shani Amavasya. Jyeshta Amavasya is also known as Shani Jayanti. Shani Amavasya begins on June 11th at 6:30 pm and continues up to 4:41 pm on June 12, 2010.
Shani Amavasya or Shani Jayanti is observed with utmost fervor in Shanidham temple, Shani Shingnapur temple, Mandapalli Mandeshwara swamy temple (Srikakulam, Andhra Pradesh), Wargal Shanishwara swamy Temple in Medak district of Andhra Pradesh.
Shani Thailabhishekam, Shani Shanti japam, Shani homam, etc are the main rituals of Shani Amavasya.