2013
- Friday, 11 January 2013 · Margashirsha Amavasya
- Sunday, 10 February 2013 · Mauni Amavasya
- Monday, 11 March 2013 · Magha Amavasya (Somvati)
- Wednesday, 10 April 2013 · Phalguna Amavasya
- Thursday, 9 May 2013 · Chaitra Amavasya
- Saturday, 8 June 2013 · Vat Savitri Amavasya (Shani)
- Monday, 8 July 2013 · Jyeshtha Amavasya (Somvati)
- Tuesday, 6 August 2013 · Hariyali Amavasya (Bhaumvati)
- Thursday, 5 September 2013 · Shravana Amavasya
- Friday, 4 October 2013 · Mahalaya / Sarvapitri Amavasya
- Sunday, 3 November 2013 · Diwali (Lakshmi Puja) Amavasya
- Monday, 2 December 2013 · Kartika Amavasya (Somvati)
2014
- Wednesday, 1 January 2014 · Margashirsha Amavasya
- Thursday, 30 January 2014 · Mauni Amavasya
- Saturday, 1 March 2014 · Magha Amavasya (Shani)
- Sunday, 30 March 2014 · Phalguna Amavasya
- Tuesday, 29 April 2014 · Chaitra Amavasya (Bhaumvati)
- Wednesday, 28 May 2014 · Vat Savitri Amavasya
- Friday, 27 June 2014 · Jyeshtha Amavasya
- Saturday, 26 July 2014 · Hariyali Amavasya (Shani)
- Monday, 25 August 2014 · Shravana Amavasya (Somvati)
- Wednesday, 24 September 2014 · Mahalaya / Sarvapitri Amavasya
- Thursday, 23 October 2014 · Diwali (Lakshmi Puja) Amavasya
- Saturday, 22 November 2014 · Kartika Amavasya (Shani)
- Sunday, 21 December 2014 · Margashirsha Amavasya
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.