Panchang in Sevan, Gegharkunik, Armenia Sat 12 Jul 1980

Amavasya follows the tithi at sunrise. Amavasya runs from 11:25 on Fri 11 Jul to 10:45 on Sat 12 Jul, so it holds sunrise only on Sat 12 Jul, at 05:39. No text giving Amavasya’s time was found; sunrise is Tithika’s convention.

Amavasya: every date in Sevan

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 348°–360° is the 30th, Krishna Amavasya. A day takes the tithi in force at its sunrise, 05:39 here. Chaturdashi ended at 11:25 Fri, before it. Amavasya ends at 10:45, when the lead reaches 360°. The lead passed 180° at the full moon of 28 Jun, so the Moon is waning: Krishna paksha.

The night of Fri 11 Jul ran from sunset 20:31 Fri to sunrise 05:39, 9 h 8 m. Cut into 15 muhurtas of 36 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:39 to 20:30, 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, 20:30 to 05:40 Sun, 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′. Punarvasu spans 80°00′–93°20′; the Moon entered its pada 2 at 83°20′. It leaves at 23:20, for Pushya.

Add the Sun's and the Moon's places among the stars: 86.3° + 83.7° = 170°. The sum, cut into 27 parts of 13°20′, gives the yoga: 160°00′–173°20′ is the 13th, Vyaghata. It ends at 11:23, then Harshana.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Amavasya is Chatushpada and the second Nagava. Chatushpada ended at 23:01 Fri, when the lead reached 354°; Nagava runs until 10:45.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:39 to 05:40 Sun, so the hours after midnight still belong to Shaniwara.

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: Vrishabha gives Jyeshtha. The Sun enters Mithuna on 14 Jun, inside the month. The next new moon, 12 Jul, finds it in Mithuna and begins Ashadha.

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 12 Jul, with the Sun in Mithuna, begins Ashadha. Until then this Krishna paksha reads Ashadha here, and Jyeshtha in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 16 Mar 1980, 22:55 Sun. Since then the Sun has moved 113.5° round the stars. Vikram Samvat numbers that year 2037; Shaka Samvat numbers it 1902.