Panchang in Sevan, Gegharkunik, Armenia Fri 28 Apr 1972

Purnima follows the tithi at sunrise. Purnima runs from 14:20 on Thu 27 Apr to 16:44 on Fri 28 Apr, so it holds sunrise only on Fri 28 Apr, at 06:03. 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, 06:03 here. Chaturdashi ended at 14:20 Thu, before it. Purnima ends at 16:44, when the lead reaches 180°. The lead passed 0° at the new moon of 14 Apr, so the Moon is waxing: Shukla paksha.

The night of Thu 27 Apr ran from sunset 19:51 Thu to sunrise 06:03, 10 h 12 m. Cut into 15 muhurtas of 40 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:03 to 19:52, splits into 8 choghadiyas of 1 h 43 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:52 to 06:01 Sat, splits into 8 choghadiyas of 1 h 16 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′. Swati spans 186°40′–200°00′; the Moon entered its pada 1 at 186°40′. It leaves at 03:09 Sat, for Vishakha.

Add the Sun's and the Moon's places among the stars: 14.4° + 189.6° = 204°. The sum, cut into 27 parts of 13°20′, gives the yoga: 200°00′–213°20′ is the 16th, Siddhi. It ends at 23:32, then Vyatipata.

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 03:32, when the lead reached 174°; Bava runs until 16:44.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:03 to 06:01 Sat, so the hours after midnight still belong to Shukrawara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 14 Apr 00:30 Fri to 13 May 08:08 Sat the Sun stayed in Mesha, entering Vrishabha at 14 May 08:26 Sun, after the new moon. A month with no sankranti is Adhika Vaishakha, before Vaishakha 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 14 Apr, with the Sun in Mesha, began Vaishakha (Adhik). This Shukla paksha reads Vaishakha (Adhik) in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 15 Mar 1972, 15:34 Wed. Since then the Sun has moved 42.9° round the stars. Vikram Samvat numbers that year 2029; Shaka Samvat numbers it 1894.