Panchang in Huron, South Dakota, United States Mon 13 Dec 2027

Purnima follows the tithi at sunrise. Purnima runs from 12:25 on Sun 12 Dec to 10:08 on Mon 13 Dec, so it holds sunrise only on Mon 13 Dec, at 08:00. No text giving Purnima’s time was found; sunrise is Tithika’s convention.

Purnima: every date in Huron

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 168°–180° is the 15th, Shukla Purnima. A day takes the tithi in force at its sunrise, 08:00 here. Chaturdashi ended at 12:25 Sun, before it. Purnima ends at 10:08, when the lead reaches 180°. The lead passed 0° at the new moon of 27 Nov, so the Moon is waxing: Shukla paksha.

A day takes the tithi in force at its sunrise. Pratipada began at 10:08 and ended at 07:31 Tue, between the sunrises of 08:00 and 08:01 Tue. Monday reads Purnima and Tuesday reads Dwitiya: Pratipada is a kshaya tithi here.

The night of Sun 12 Dec ran from sunset 16:53 Sun to sunrise 08:00, 15 h 7 m. Cut into 15 muhurtas of 1 h 0 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 08:00 to 16:53, splits into 8 choghadiyas of 1 h 6 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 16:53 to 08:01 Tue, splits into 8 choghadiyas of 1 h 53 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The fixed stars divide the Moon's path into 27 nakshatras of 13°20′, each in 4 padas of 3°20′. Mrigashira spans 53°20′–66°40′; the Moon entered its pada 1 at 53°20′. It leaves at 01:55 Tue, for Ardra.

Add the Sun's and the Moon's places among the stars: 237.1° + 55.9° = 293°. The sum, cut into 27 parts of 13°20′, gives the yoga: 280°00′–293°20′ is the 22nd, Sadhya. It ends at 08:36, then Shubha.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Purnima is Vishti and the second Bava. Vishti ended at 23:20 Sun, when the lead reached 174°; Bava runs until 10:08.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 08:00 to 08:01 Tue, so the hours after midnight still belong to Somawara.

An amanta month runs from new moon to new moon and takes its name from the rashi the Sun is in at the new moon that begins it: Vrishchika gives Margashirsha. The Sun enters Dhanu on 16 Dec, inside the month. The next new moon, 27 Dec, finds it in Dhanu and begins Pausha.

A purnimanta month runs from full moon to full moon, so its waning half comes first. It shares its name with the amanta month that its second half falls in: the new moon of 27 Nov, with the Sun in Vrishchika, began Margashirsha. This Shukla paksha reads Margashirsha in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 6 Apr 2027, 18:51 Tue. Since then the Sun has moved 244.4° round the stars. Vikram Samvat numbers that year 2084; Shaka Samvat numbers it 1949.