Panchang in Ipameri, Goiás, Brazil Thu 27 Dec 2012

Purnima follows the tithi at sunrise. Purnima holds both sunrises, 06:38 on Thu 27 Dec and 06:39 on Fri 28 Dec. Over two sunrises the Nirnayasindhu takes the first: Thu 27 Dec. No text giving Purnima’s time was found; sunrise is Tithika’s convention.

Purnima: every date in Ipameri

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, 06:38 here. Chaturdashi ended at 05:56, before it. Purnima ends at 08:21 Fri, when the lead reaches 180°. The lead passed 0° at the new moon of 13 Dec, so the Moon is waxing: Shukla paksha.

A day takes the tithi in force at its sunrise. Purnima began at 05:56, before sunrise at 06:38, and ends at 08:21 Fri, after the next sunrise at 06:39 Fri. Both days read Purnima: it is a vriddhi tithi here.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 07:12, came before Chaturdashi ended at 13:26: this day reads Chaturdashi.

Ipameri · UTC−2

Sunrise here, 06:38, came after Chaturdashi ended at 05:56: this day reads Purnima.

The night of Wed 26 Dec ran from sunset 19:49 Wed to sunrise 06:38, 10 h 49 m. Cut into 15 muhurtas of 43 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:38 to 19:49, splits into 8 choghadiyas of 1 h 38 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:49 to 06:39 Fri, splits into 8 choghadiyas of 1 h 21 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 3 at 60°. It leaves at 19:32, for Ardra.

Add the Sun's and the Moon's places among the stars: 252° + 60.3° = 312.3°. The sum, cut into 27 parts of 13°20′, gives the yoga: 306°40′–320°00′ is the 24th, Shukla. It ends at 21:03, then Brahma.

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 runs until 19:11, when the lead reaches 174°; Bava until 08:21 Fri.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:38 to 06:39 Fri, so the hours after midnight still belong to Guruwara.

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 15 Dec, inside the month. The next new moon, 11 Jan, 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 13 Dec, 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: 22 Mar 2012, 11:37 Thu. Since then the Sun has moved 273.7° round the stars. Vikram Samvat numbers that year 2069; Shaka Samvat numbers it 1934.