this period, the dark moon day, called mahalaya Amavasya, is considered the most important day in the year for performing obsequies and rites. The manes return to their abode on the evening of Deepavali. Due to the grace of the Yama, it has been ordained that offerings made during this period benefit all the departed souls, whether they are connected to you or not. Rameshwaram In Tamil Nadu, lakhs of People will make special Tharpanam (Oblation) in Rameshwaram & other Holy Theerthas on Thai Amavasai, Aadi Amavasai, Mahalaya Amavasai. Thai Amavasai comes in the month of Jan-Feb and is the 1st Amavasai after Uttranayana Punya Kaalam (Northern Journey of Sun). Aadi Amavasai comes in the month of Jul-Aug and is the 1st Amavasai after Dakshinayanam Punya Kaalam (Southern Journey of Sun). Pitru Paksh Mahalaya Amavasai comes during Navratri References External links Kalnirnay on iPhone Tithi Calendar A discussion of Amāvāsyā translation issues within Monier-Williams’ Sanskrit Dictionary Amavasya Hindu astronomy Hindu calendar Hindu astrology Days of the Hindu calendar Observances held on the new moon Hindu festivals