Panchang in Sevan, Gegharkunik, Armenia Wed 30 May 1923

Purnima follows the tithi at sunrise. Purnima runs from 11:30 on Tue 29 May to 08:05 on Wed 30 May, so it holds sunrise only on Wed 30 May, at 04:31. 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, 04:33 here. Chaturdashi ended at 11:32 Tue, before it. Purnima ends at 08:07, when the lead reaches 180°. The lead passed 0° at the new moon of 16 May, so the Moon is waxing: Shukla paksha.

The night of Tue 29 May ran from sunset 19:20 Tue to sunrise 04:33, 9 h 13 m. Cut into 15 muhurtas of 36 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 04:33 to 19:21, splits into 8 choghadiyas of 1 h 51 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:21 to 04:32 Thu, splits into 8 choghadiyas of 1 h 8 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′. Anuradha spans 213°20′–226°40′; the Moon entered its pada 3 at 220°. It leaves at 10:49, for Jyeshtha.

Add the Sun's and the Moon's places among the stars: 44.8° + 222.8° = 267.6°. The sum, cut into 27 parts of 13°20′, gives the yoga: 266°40′–280°00′ is the 21st, Siddha. It ends at 23:22, then Sadhya.

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 21:48 Tue, when the lead reached 174°; Bava runs until 08:07.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 04:33 to 04:32 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 May 01:38 Wed to 14 Jun 15:41 Thu the Sun stayed in Vrishabha, entering Mithuna at 15 Jun 00:42 Fri, after the new moon. A month with no sankranti is Adhika Jyeshtha, before Jyeshtha 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 May, with the Sun in Vrishabha, began Jyeshtha (Adhik). This Shukla paksha reads Jyeshtha (Adhik) in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 17 Mar 1923, 15:51 Sat. Since then the Sun has moved 71.7° round the stars. Vikram Samvat numbers that year 1980; Shaka Samvat numbers it 1845.