2007
- Friday, 19 January 2007 · Mauni Amavasya
- Saturday, 17 February 2007 · Magha Amavasya (Shani)
- Monday, 19 March 2007 · Phalguna Amavasya (Somvati)
- Tuesday, 17 April 2007 · Chaitra Amavasya (Bhaumvati)
- Wednesday, 16 May 2007 · Vat Savitri Amavasya
- Friday, 15 June 2007 · Adhika Jyeshtha Amavasya
- Saturday, 14 July 2007 · Jyeshtha Amavasya (Shani)
- Sunday, 12 August 2007 · Hariyali Amavasya
- Tuesday, 11 September 2007 · Shravana Amavasya (Bhaumvati)
- Thursday, 11 October 2007 · Mahalaya / Sarvapitri Amavasya
- Friday, 9 November 2007 · Diwali (Lakshmi Puja) Amavasya
- Sunday, 9 December 2007 · Kartika Amavasya
2008
- Tuesday, 8 January 2008 · Margashirsha Amavasya (Bhaumvati)
- Thursday, 7 February 2008 · Mauni Amavasya
- Friday, 7 March 2008 · Magha Amavasya
- Sunday, 6 April 2008 · Phalguna Amavasya
- Monday, 5 May 2008 · Chaitra Amavasya (Somvati)
- Tuesday, 3 June 2008 · Vat Savitri Amavasya (Bhaumvati)
- Thursday, 3 July 2008 · Jyeshtha Amavasya
- Friday, 1 August 2008 · Hariyali Amavasya
- Saturday, 30 August 2008 · Shravana Amavasya (Shani)
- Monday, 29 September 2008 · Mahalaya / Sarvapitri Amavasya (Somvati)
- Tuesday, 28 October 2008 · Diwali (Lakshmi Puja) Amavasya (Bhaumvati)
- Thursday, 27 November 2008 · Kartika Amavasya
- Saturday, 27 December 2008 · Margashirsha Amavasya (Shani)
How the date is fixed
Every new-moon day, taken as the day on which Amavasya is running at sunrise. One that falls on a Monday is called Somvati, on a Tuesday Bhaumvati, and on a Saturday Shani Amavasya. Amavasya ends the dark half, so both month names are given.
About
Amavasya is the tithi in which the Moon's longitude returns to the Sun's, closing the dark half and, in amanta reckoning, the month itself. It is the tithi of the pitris, and tarpana for ancestors is its regular observance; the aparahna (afternoon) is the governing period for shraddha, so the day whose afternoon carries Amavasya is chosen. Several named Amavasyas stand out: Sarva Pitru Amavasya ending Pitru Paksha, Diwali on Ashwina Amavasya, Mauni Amavasya in Pausha, and any Amavasya on a Monday (Somvati) or Saturday (Shani). Solar eclipses can only occur on Amavasya, which is why eclipse rules are tied to it.
How it is observed
Tarpana for ancestors in the afternoon, river bathing on Somvati and Mauni Amavasya, and lamps at dusk.