Panchang in Sevan, Gegharkunik, Armenia Sun 11 Dec 1966

Amavasya follows the tithi at sunrise. Amavasya begins at 08:42 on Sun 11 Dec, after that sunrise, and ends at 07:13 on Mon 12 Dec, before the next: it holds no sunrise. A tithi that holds no sunrise is kept on the day it is current: Sun 11 Dec. 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: 336°–348° is the 29th, Krishna Chaturdashi. A day takes the tithi in force at its sunrise, 08:12 here. Trayodashi ended at 10:31 Sat, before it. Chaturdashi ends at 08:42, when the lead reaches 348°. The lead passed 180° at the full moon of 28 Nov, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise. Amavasya began at 08:42 and ended at 07:13 Mon, between the sunrises of 08:12 and 08:13 Mon. Sunday reads Chaturdashi and Monday reads Pratipada: Amavasya is a kshaya tithi here.

The night of Sat 10 Dec ran from sunset 17:33 Sat to sunrise 08:12, 14 h 39 m. Cut into 15 muhurtas of 58 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 08:12 to 17:33, splits into 8 choghadiyas of 1 h 10 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:33 to 08:13 Mon, splits into 8 choghadiyas of 1 h 50 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 14:32, for Jyeshtha.

Add the Sun's and the Moon's places among the stars: 235.3° + 223° = 458.3°, one full turn and 98.3°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 93°20′–106°40′ is the 8th, Dhriti. It ends at 21:44, then Shula.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Chaturdashi is Vishti and the second Shakuni. Vishti ended at 21:35 Sat, when the lead reached 342°; Shakuni runs until 08:42.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 08:12 to 08:13 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: Tula gives Kartika. The Sun enters Vrishchika on 16 Nov, inside the month. The next new moon, 12 Dec, finds it in Vrishchika and begins Margashirsha.

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 Dec, with the Sun in Vrishchika, begins Margashirsha. Until then this Krishna paksha reads Margashirsha here, and Kartika in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 22 Mar 1966, 08:46 Tue. Since then the Sun has moved 257.6° round the stars. Vikram Samvat numbers that year 2023; Shaka Samvat numbers it 1888.