Panchang in Ipameri, Goiás, Brazil Sat 29 Jun 1912

Purnima follows the tithi at sunrise. Purnima runs from 08:33 on Fri 28 Jun to 10:26 on Sat 29 Jun, so it holds sunrise only on Sat 29 Jun, at 06:37. 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, 06:43 here. Chaturdashi ended at 08:40 Fri, before it. Purnima ends at 10:33, when the lead reaches 180°. The lead passed 0° at the new moon of 15 Jun, so the Moon is waxing: Shukla paksha.

The night of Fri 28 Jun ran from sunset 17:48 Fri to sunrise 06:43, 12 h 56 m. Cut into 15 muhurtas of 51 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:43 to 17:48, splits into 8 choghadiyas of 1 h 23 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:48 to 06:43 Sun, splits into 8 choghadiyas of 1 h 37 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′. Mula spans 240°00′–253°20′; the Moon entered its pada 4 at 250°. It leaves at 07:41, for Purva Ashadha.

Add the Sun's and the Moon's places among the stars: 74.6° + 252.8° = 327.4°. The sum, cut into 27 parts of 13°20′, gives the yoga: 320°00′–333°20′ is the 25th, Brahma. It ends at 17:35, then Indra.

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 21:34 Fri, when the lead reached 174°; Bava runs until 10:33.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:43 to 06:43 Sun, so the hours after midnight still belong to Shaniwara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 15 Jun 03:23 Sat to 14 Jul 10:12 Sun the Sun stayed in Mithuna, entering Karka at 15 Jul 10:02 Mon, after the new moon. A month with no sankranti is Adhika Ashadha, before Ashadha itself.

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 15 Jun, with the Sun in Mithuna, began Ashadha (Adhik). This Shukla paksha reads Ashadha (Adhik) in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 18 Mar 1912, 19:08 Mon. Since then the Sun has moved 99.3° round the stars. Vikram Samvat numbers that year 1969; Shaka Samvat numbers it 1834.