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
2015
- Tuesday, 20 January 2015 · Mauni Amavasya (Bhaumvati)
- Wednesday, 18 February 2015 · Magha Amavasya
- Friday, 20 March 2015 · Phalguna Amavasya
- Saturday, 18 April 2015 · Chaitra Amavasya (Shani)
- Monday, 18 May 2015 · Vat Savitri Amavasya (Somvati)
- Tuesday, 16 June 2015 · Jyeshtha Amavasya (Bhaumvati)
- Thursday, 16 July 2015 · Adhika Ashadha Amavasya
- Friday, 14 August 2015 · Hariyali Amavasya
- Sunday, 13 September 2015 · Shravana Amavasya
- Monday, 12 October 2015 · Mahalaya / Sarvapitri Amavasya (Somvati)
- Wednesday, 11 November 2015 · Diwali (Lakshmi Puja) Amavasya
- Friday, 11 December 2015 · Kartika 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.