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Purnima 2027

Every Pūrṇimā of 2027: when the tithi begins and ends, and the fast day.

The Satyanarayan Puja is kept on the Purnima by popular practice; no text read gives the day.

12 Purnimas in Delhi

The next fast is on Friday, 22 January. The fast falls on the later day, joined to the next Pratipadā. Nirṇaya-sindhu p. 73

Every Purnima of 2027 in Delhi

Delhi time
MonthPurnimaFast day
January Pausha, Purnima 21 Jan, 21:30 – 22 Jan, 17:47 Fri 22 Jan
February Magha, Purnima 20 Feb, 08:00 – 21 Feb, 04:53 Chandra Grahan on this Purnima, penumbral, not reckoned Sat 20 Feb
March Phalguna, Purnima 21 Mar, 18:22 – 22 Mar, 16:13 Mon 22 Mar
April Chaitra, Purnima 20 Apr, 04:51 – 21 Apr, 03:57 Tue 20 Apr
May Vaishakha, Purnima 19 May, 16:03 – 20 May, 16:29 Thu 20 May
June Jyeshtha, Purnima 18 Jun, 04:35 – 19 Jun, 06:14 Sat 19 Jun
July Ashadha, Purnima 17 Jul, 18:48 – 18 Jul, 21:14 Chandra Grahan on this Purnima, penumbral, not reckoned Sun 18 Jul
August Shravana, Purnima 16 Aug, 10:29 – 17 Aug, 12:58 Chandra Grahan on this Purnima, penumbral, not reckoned Tue 17 AugFamily custom: Mon 16 Aug
September Bhadrapada, Purnima 15 Sep, 02:48 – 16 Sep, 04:33 Wed 15 Sep
October Ashwin, Purnima 14 Oct, 18:49 – 15 Oct, 19:17 Fri 15 Oct
November Kartika, Purnima 13 Nov, 09:55 – 14 Nov, 08:55 Sun 14 NovFamily custom: Sat 13 Nov
December Margashirsha, Purnima 12 Dec, 23:55 – 13 Dec, 21:38 Mon 13 Dec

Purnima in 2027, month by month

January 22 February 20 March 22 April 20 May 20 June 19 July 18 August 17 September 15 October 15 November 14 December 13

Questions

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

When are the Purnimas in 2027?

In Delhi, 12 Purnimas fall in 2027. The table lists each with its fast day and when the Purnima begins and ends.

What is Purnima?

The full moon: the fifteenth tithi, which ends the bright half (Shukla) of the lunar month. A tithi is the time the Moon takes to gain 12° on the Sun. In the pūrṇimānta reckoning the Pūrṇimā is the last day of the month. Surya Siddhanta 2.64, 2.66

Which day is the Purnima 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

Why do some calendars show the Purnima fast a day earlier?

Some families keep the Pūrṇimā on the earlier day, joined to Caturdaśī, as a family custom (kula-dharma). The Dharmasindhu says the basis for doing so every month is still to be sought, and accepts the earlier day only when the Caturdaśī lasts under eighteen nāḍīs (7 hours 12 minutes) after that day’s sunrise. These pages show the earlier day only then, labelled family custom; the fast itself is the later day, by the rule of the Nirṇaya-sindhu. Dharmasindhu p. 20

Why is the date different in my city?

Each date is worked out for the city’s own sunrise. The Pūrṇimā begins and ends at the same moment everywhere, but which sunrise 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.
Sunrise
At the centre of the Sun’s disc, with refraction, for the chosen city. Every date is that city’s own.
Family custom
The earlier day, joined to Caturdaśī, is shown only when the Caturdaśī lasts under eighteen nāḍīs (7 h 12 min) after that day’s sunrise, the one case in which the Dharmasindhu accepts it for family custom (kula-dharma). We count the nāḍīs from that sunrise to the start of the Pūrṇimā: our reading.
Festivals
Festivals that fall on a Pūrṇimā follow rules of their own, which these dates do not apply.
Sources
Nirṇaya-sindhu, 1898, p. 73 (Brahma-vaivarta); Dharmasindhu, 1888, p. 20.

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