2049
- Monday, 4 January 2049 · Margashirsha Amavasya (Somvati)
- Tuesday, 2 February 2049 · Mauni Amavasya (Bhaumvati)
- Wednesday, 3 March 2049 · Magha Amavasya
- Friday, 2 April 2049 · Phalguna Amavasya
- Saturday, 1 May 2049 · Chaitra Amavasya (Shani)
- Monday, 31 May 2049 · Vat Savitri Amavasya (Somvati)
- Wednesday, 30 June 2049 · Jyeshtha Amavasya
- Thursday, 29 July 2049 · Hariyali Amavasya
- Saturday, 28 August 2049 · Shravana Amavasya (Shani)
- Monday, 27 September 2049 · Mahalaya / Sarvapitri Amavasya (Somvati)
- Tuesday, 26 October 2049 · Diwali (Lakshmi Puja) Amavasya (Bhaumvati)
- Thursday, 25 November 2049 · Kartika Amavasya
- Friday, 24 December 2049 · Margashirsha Amavasya
2050
- Sunday, 23 January 2050 · Mauni Amavasya
- Monday, 21 February 2050 · Magha Amavasya (Somvati)
- Tuesday, 22 March 2050 · Phalguna Amavasya (Bhaumvati)
- Thursday, 21 April 2050 · Chaitra Amavasya
- Friday, 20 May 2050 · Vat Savitri Amavasya
- Sunday, 19 June 2050 · Jyeshtha Amavasya
- Monday, 18 July 2050 · Hariyali Amavasya (Somvati)
- Wednesday, 17 August 2050 · Shravana Amavasya
- Friday, 16 September 2050 · Adhika Bhadrapada Amavasya
- Saturday, 15 October 2050 · Mahalaya / Sarvapitri Amavasya (Shani)
- Monday, 14 November 2050 · Diwali (Lakshmi Puja) Amavasya (Somvati)
- Wednesday, 14 December 2050 · 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.