2033
- Saturday, 1 January 2033 · Margashirsha Amavasya (Shani)
- Sunday, 30 January 2033 · Mauni Amavasya
- Tuesday, 1 March 2033 · Magha Amavasya (Bhaumvati)
- Wednesday, 30 March 2033 · Phalguna Amavasya
- Friday, 29 April 2033 · Chaitra Amavasya
- Saturday, 28 May 2033 · Vat Savitri Amavasya (Shani)
- Sunday, 26 June 2033 · Jyeshtha Amavasya
- Tuesday, 26 July 2033 · Hariyali Amavasya (Bhaumvati)
- Wednesday, 24 August 2033 · Shravana Amavasya
- Friday, 23 September 2033 · Mahalaya / Sarvapitri Amavasya
- Sunday, 23 October 2033 · Diwali (Lakshmi Puja) Amavasya
- Monday, 21 November 2033 · Kartika Amavasya (Somvati)
- Wednesday, 21 December 2033 · Margashirsha Amavasya
2034
- Friday, 20 January 2034 · Mauni Amavasya
- Saturday, 18 February 2034 · Magha Amavasya (Shani)
- Monday, 20 March 2034 · Phalguna Amavasya (Somvati)
- Tuesday, 18 April 2034 · Chaitra Amavasya (Bhaumvati)
- Thursday, 18 May 2034 · Vat Savitri Amavasya
- Friday, 16 June 2034 · Jyeshtha Amavasya
- Saturday, 15 July 2034 · Adhika Ashadha Amavasya (Shani)
- Monday, 14 August 2034 · Hariyali Amavasya (Somvati)
- Tuesday, 12 September 2034 · Shravana Amavasya (Bhaumvati)
- Thursday, 12 October 2034 · Mahalaya / Sarvapitri Amavasya
- Friday, 10 November 2034 · Diwali (Lakshmi Puja) Amavasya
- Sunday, 10 December 2034 · 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.
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.