Panchang in Sevan, Gegharkunik, Armenia Sun 31 Jul 1955

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi began at 17:33 on Sun 31 Jul, before that evening’s pradosha, and ended at 19:39 on Mon 1 Aug, partway into the next. The Nirnayasindhu takes the evening Trayodashi fills: Sun 31 Jul. No text giving Pradosh Vrat’s time was found; pradosha is Tithika’s convention.

Pradosh Vrat: every date in Sevan

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 132°–144° is the 12th, Shukla Dwadashi. A day takes the tithi in force at its sunrise, 04:55 here. Ekadashi ended at 15:08 Sat, before it. Dwadashi ends at 17:33, when the lead reaches 144°. The lead passed 0° at the new moon of 19 Jul, so the Moon is waxing: Shukla paksha.

The night of Sat 30 Jul ran from sunset 19:18 Sat to sunrise 04:55, 9 h 37 m. Cut into 15 muhurtas of 38 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 04:55 to 19:16, splits into 8 choghadiyas of 1 h 47 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:16 to 04:56 Mon, splits into 8 choghadiyas of 1 h 12 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′. Mula spans 240°00′–253°20′; the Moon entered its pada 1 at 240°. It leaves at 03:31 Mon, for Purva Ashadha.

Add the Sun's and the Moon's places among the stars: 103.9° + 242.1° = 346°. The sum, cut into 27 parts of 13°20′, gives the yoga: 333°20′–346°40′ is the 26th, Indra. It ends at 06:12, then Vaidhriti.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Dwadashi is Bava and the second Balava. Bava ended at 04:22, when the lead reached 138°; Balava runs until 17:33.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 04:55 to 04:56 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: Karka gives Shravana. The Sun enters Simha on 17 Aug, inside the month. The next new moon, 17 Aug, finds it in Simha and begins Bhadrapada.

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 19 Jul, with the Sun in Karka, began Shravana. This Shukla paksha reads Shravana in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 24 Mar 1955, 06:42 Thu. Since then the Sun has moved 124.4° round the stars. Vikram Samvat numbers that year 2012; Shaka Samvat numbers it 1877.