2025
- Wednesday, 29 January 2025 · Mauni Amavasya
- Thursday, 27 February 2025 · Magha Amavasya
- Saturday, 29 March 2025 · Phalguna Amavasya (Shani)
- Sunday, 27 April 2025 · Chaitra Amavasya
- Tuesday, 27 May 2025 · Vat Savitri Amavasya (Bhaumvati)
- Wednesday, 25 June 2025 · Jyeshtha Amavasya
- Thursday, 24 July 2025 · Hariyali Amavasya
- Saturday, 23 August 2025 · Shravana Amavasya (Shani)
- Sunday, 21 September 2025 · Mahalaya / Sarvapitri Amavasya
- Tuesday, 21 October 2025 · Diwali (Lakshmi Puja) Amavasya (Bhaumvati)
- Thursday, 20 November 2025 · Kartika Amavasya
- Friday, 19 December 2025 · Margashirsha Amavasya
2026
- Sunday, 18 January 2026 · Mauni Amavasya
- Tuesday, 17 February 2026 · Magha Amavasya (Bhaumvati)
- Thursday, 19 March 2026 · Phalguna Amavasya
- Friday, 17 April 2026 · Chaitra Amavasya
- Saturday, 16 May 2026 · Vat Savitri Amavasya (Shani)
- Monday, 15 June 2026 · Adhika Jyeshtha Amavasya (Somvati)
- Tuesday, 14 July 2026 · Jyeshtha Amavasya (Bhaumvati)
- Wednesday, 12 August 2026 · Hariyali Amavasya
- Friday, 11 September 2026 · Shravana Amavasya
- Saturday, 10 October 2026 · Mahalaya / Sarvapitri Amavasya (Shani)
- Monday, 9 November 2026 · Diwali (Lakshmi Puja) Amavasya (Somvati)
- Tuesday, 8 December 2026 · Kartika Amavasya (Bhaumvati)
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.