Panchang in Ipameri, Goiás, Brazil Sun 1 Aug 1909

Purnima follows the tithi at sunrise. Purnima runs from 20:38 on Sat 31 Jul to 18:07 on Sun 1 Aug, so it holds sunrise only on Sun 1 Aug, at 06:32. 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, 06:39 here. Chaturdashi ended at 20:45 Sat, before it. Purnima ends at 18:13, when the lead reaches 180°. The lead passed 0° at the new moon of 17 Jul, so the Moon is waxing: Shukla paksha.

The night of Sat 31 Jul ran from sunset 17:58 Sat to sunrise 06:39, 12 h 40 m. Cut into 15 muhurtas of 50 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:39 to 17:58, splits into 8 choghadiyas of 1 h 25 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:58 to 06:38 Mon, splits into 8 choghadiyas of 1 h 35 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′. Uttara Ashadha spans 266°40′–280°00′; the Moon entered its pada 4 at 276°40′. It leaves at 07:41, for Shravana.

Add the Sun's and the Moon's places among the stars: 105.9° + 279.4° = 385.3°, one full turn and 25.3°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 13°20′–26°40′ is the 2nd, Priti. It ends at 08:51, then Ayushmana.

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 07:32, when the lead reaches 174°; Bava until 18:13.

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

A month normally holds one sankranti, the Sun's entry into a new rashi. From 17 Jul 07:44 Sat to 15 Aug 20:54 Sun the Sun stayed in Karka, entering Simha at 15 Aug 00:05 Mon, after the new moon. A month with no sankranti is Adhika Shravana, before Shravana 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 17 Jul, with the Sun in Karka, began Shravana (Adhik). This Shukla paksha reads Shravana (Adhik) in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 21 Mar 1909, 17:11 Sun. Since then the Sun has moved 127.9° round the stars. Vikram Samvat numbers that year 1966; Shaka Samvat numbers it 1831.