Panchang in Sevan, Gegharkunik, Armenia Sun 15 Feb 1976

Purnima follows the tithi at sunrise. Purnima runs from 23:39 on Sat 14 Feb to 20:43 on Sun 15 Feb, so it holds sunrise only on Sun 15 Feb, at 07:55. 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, 07:55 here. Chaturdashi ended at 23:39 Sat, before it. Purnima ends at 20:43, when the lead reaches 180°. The lead passed 0° at the new moon of 31 Jan, so the Moon is waxing: Shukla paksha.

The night of Sat 14 Feb ran from sunset 18:32 Sat to sunrise 07:55, 13 h 23 m. Cut into 15 muhurtas of 53 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:55 to 18:33, splits into 8 choghadiyas of 1 h 19 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:33 to 07:53 Mon, splits into 8 choghadiyas of 1 h 40 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′. Ashlesha spans 106°40′–120°00′; the Moon entered its pada 3 at 113°20′. It leaves at 16:29, for Magha.

Add the Sun's and the Moon's places among the stars: 302.1° + 114.8° = 416.9°, one full turn and 56.9°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 53°20′–66°40′ is the 5th, Shobhana. It ends at 22:55, then Atiganda.

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 10:14, when the lead reaches 174°; Bava until 20:43.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:55 to 07:53 Mon, so the hours after midnight still belong to Raviwara.

An amanta month runs from new moon to new moon and takes its name from the rashi the Sun is in at the new moon that begins it: Makara gives Magha. The Sun enters Kumbha on 13 Feb, inside the month. The next new moon, 1 Mar, finds it in Kumbha and begins Phalguna.

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 31 Jan, with the Sun in Makara, began Magha. This Shukla paksha reads Magha in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 11 Apr 1975, 20:38 Fri. Since then the Sun has moved 304.4° round the stars. Vikram Samvat numbers that year 2032; Shaka Samvat numbers it 1897.