2042
- Tuesday, 21 January 2042 · Mauni Amavasya (Bhaumvati)
- Thursday, 20 February 2042 · Magha Amavasya
- Friday, 21 March 2042 · Phalguna Amavasya
- Sunday, 20 April 2042 · Chaitra Amavasya
- Monday, 19 May 2042 · Vat Savitri Amavasya (Somvati)
- Tuesday, 17 June 2042 · Jyeshtha Amavasya (Bhaumvati)
- Thursday, 17 July 2042 · Hariyali Amavasya
- Friday, 15 August 2042 · Adhika Shravana Amavasya
- Sunday, 14 September 2042 · Shravana Amavasya
- Monday, 13 October 2042 · Mahalaya / Sarvapitri Amavasya (Somvati)
- Wednesday, 12 November 2042 · Diwali (Lakshmi Puja) Amavasya
- Friday, 12 December 2042 · Kartika Amavasya
2043
- Sunday, 11 January 2043 · Margashirsha Amavasya
- Monday, 9 February 2043 · Mauni Amavasya (Somvati)
- Wednesday, 11 March 2043 · Magha Amavasya
- Thursday, 9 April 2043 · Phalguna Amavasya
- Saturday, 9 May 2043 · Chaitra Amavasya (Shani)
- Sunday, 7 June 2043 · Vat Savitri Amavasya
- Monday, 6 July 2043 · Jyeshtha Amavasya (Somvati)
- Wednesday, 5 August 2043 · Hariyali Amavasya
- Thursday, 3 September 2043 · Shravana Amavasya
- Saturday, 3 October 2043 · Mahalaya / Sarvapitri Amavasya (Shani)
- Sunday, 1 November 2043 · Diwali (Lakshmi Puja) Amavasya
- Tuesday, 1 December 2043 · Kartika Amavasya (Bhaumvati)
- Thursday, 31 December 2043 · 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.