Panchang in Sevan, Gegharkunik, Armenia Wed 30 Jul 1958

Purnima follows the tithi at sunrise. Purnima runs from 21:00 on Tue 29 Jul to 20:46 on Wed 30 Jul, so it holds sunrise only on Wed 30 Jul, at 05:54. No text giving Purnima’s time was found; sunrise is Tithika’s convention.

Purnima: every date in Sevan

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, 05:54 here. Chaturdashi ended at 21:00 Tue, before it. Purnima ends at 20:46, when the lead reaches 180°. The lead passed 0° at the new moon of 16 Jul, so the Moon is waxing: Shukla paksha.

The night of Tue 29 Jul ran from sunset 20:18 Tue to sunrise 05:54, 9 h 36 m. Cut into 15 muhurtas of 38 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:54 to 20:17, splits into 8 choghadiyas of 1 h 47 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 20:17 to 05:55 Thu, splits into 8 choghadiyas of 1 h 12 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 3 at 273°20′. It leaves at 13:54, for Shravana.

Add the Sun's and the Moon's places among the stars: 103.1° + 275.6° = 378.7°, one full turn and 18.7°. 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 19:26, 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 08:50, when the lead reaches 174°; Bava until 20:46.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:54 to 05:55 Thu, so the hours after midnight still belong to Budhawara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 16 Jul 22:33 Wed to 15 Aug 07:33 Fri the Sun stayed in Karka, entering Simha at 16 Aug 20:17 Sat, 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 16 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: 20 Mar 1958, 13:49 Thu. Since then the Sun has moved 127.1° round the stars. Vikram Samvat numbers that year 2015; Shaka Samvat numbers it 1880.