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Amavasya in August 2027

The Amāvasyā of August 2027: when the tithi begins and ends, the fast day and the śrāddha day, for your city’s sunrise.

Amavasya in Delhi

  • Fast day · Ashadha / Shravana · SomavatīMonday, 2 August
  • ŚrāddhaThe same day
  • Fast day · Shravana / Bhadrapada · BhaumaTuesday, 31 August
  • ŚrāddhaThe same day

Monday, 2 August

Ashadha (amanta) / Shravana (purnimanta), Amavasya · Somavatī

Amavasya from Sun 1 Aug, 19:20 to Mon 2 Aug, 15:35, Delhi time.

Fast day, Monday, 2 August: the fast takes the later of Sunday and Monday, the day joined to the next Pratipadā, and never the day joined to Chaturdaśī. Nirṇaya-sindhu p. 73

Śrāddha, Monday, 2 August: the Amāvasyā covers 20% of Monday’s aparāhṇa, the last third of the daytime, and none of Sunday’s. Nirṇaya-sindhu pp. 81, 87

Tuesday, 31 August

Shravana (amanta) / Bhadrapada (purnimanta), Amavasya · Bhauma

Amavasya from Tue 31 Aug, 02:41 to 23:11, Delhi time.

Fast day, Tuesday, 31 August: the fast takes the later of Monday and Tuesday, the day joined to the next Pratipadā, and never the day joined to Chaturdaśī. Nirṇaya-sindhu p. 73

Śrāddha, Tuesday, 31 August: the Amāvasyā covers all of Tuesday’s aparāhṇa, the last third of the daytime, and none of Monday’s. Nirṇaya-sindhu pp. 81, 87

Questions

Rules from the Nirṇaya-sindhu, with the page for each.

When is Amavasya in August 2027?

In Delhi: the fast on Monday, 2 August, with the śrāddha the same day; the fast on Tuesday, 31 August, with the śrāddha the same day.

What is Amavasya?

The new moon: the thirtieth tithi, which ends the dark half (Krishna) of the lunar month. A tithi is the time the Moon takes to gain 12° on the Sun. In the amānta reckoning the Amāvasyā is the last day of the month. Surya Siddhanta 2.64, 2.66

Which day is the Amavasya fast?

The fast is kept on the later of the two days, the one joined to the next Pratipadā, and never on the day joined to Chaturdaśī. The Sāvitrī vrata is the exception and keeps the earlier day. Nirṇaya-sindhu p. 73

When is the Amavasya shraddha?

On the day whose aparāhṇa, the last third of the daytime, the Amāvasyā touches. When it touches both afternoons, the day whose kutapa, the 8th of the day’s 15 muhūrtas, it covers. Hemādri makes the kutapa the first test for households without sacred fires, and Hārīta’s rule by Vedic branch decides equal coverage. Nirṇaya-sindhu pp. 81⁠–⁠87

Why is the date different in my city?

Each date is worked out for the city’s own sunrise and afternoon. The Amāvasyā begins and ends at the same moment everywhere, but which sunrise and afternoon it reaches depends on the city, so cities far apart can keep different days.

How the days are found

Read the methodology
Fast day
The fast is on the later day, joined to the next Pratipadā, and never on the day joined to Chaturdaśī. The Sāvitrī vrata keeps the earlier day.
Śrāddha
The day whose aparāhṇa, the last third of the daytime, the Amāvasyā touches. When it touches both afternoons, or neither, the kutapa decides: the 8th of the day’s 15 muhūrtas.
Sunrise and sunset
At the centre of the Sun’s disc, with refraction, for the chosen city. Every date is that city’s own.
Sources
Nirṇaya-sindhu, 1898, pp. 73, 81⁠–⁠87, 215, 324, 341, with Hemādri’s and Hārīta’s variants for the śrāddha.

Sunrise and sunset at the centre of the Sun’s disc, with refraction · Lahiri ayanamsa for month names · each city’s own time · Swiss Ephemeris · Method