Panchang in Sevan, Gegharkunik, Armenia Sun 11 Aug 1901

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 14:32 on Sun 11 Aug to 13:08 on Mon 12 Aug, so only Sunday’s pradosha (19:02–21:02) falls within it. 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: 312°–324° is the 27th, Krishna Dwadashi. A day takes the tithi in force at its sunrise, 05:05 here. Ekadashi ended at 16:12 Sat, before it. Dwadashi ends at 14:34, when the lead reaches 324°. The lead passed 180° at the full moon of 31 Jul, so the Moon is waning: Krishna paksha.

The night of Sat 10 Aug ran from sunset 19:05 Sat to sunrise 05:05, 10 h 0 m. Cut into 15 muhurtas of 40 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:05 to 19:04, splits into 8 choghadiyas of 1 h 44 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:04 to 05:06 Mon, splits into 8 choghadiyas of 1 h 15 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′. Ardra spans 66°40′–80°00′; the Moon entered its pada 3 at 73°20′. It leaves at 15:17, for Punarvasu.

Add the Sun's and the Moon's places among the stars: 115.2° + 74.1° = 189.3°. The sum, cut into 27 parts of 13°20′, gives the yoga: 186°40′–200°00′ is the 15th, Vajra. It ends at 22:27, then Siddhi.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Dwadashi is Kaulava and the second Taitila. Kaulava ended at 03:21, when the lead reached 318°; Taitila runs until 14:34.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:05 to 05:06 Mon, so the hours after midnight still belong to Raviwara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 16 Jul 01:10 Tue to 14 Aug 11:27 Wed the Sun stayed in Karka, entering Simha at 16 Aug 04:52 Fri, after the new moon. A month with no sankranti is Adhika Shravana, before Shravana 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 Aug, with the Sun in Karka, begins Shravana (Adhik). Until then this Krishna paksha reads Shravana (Adhik) here, and Shravana (Adhik) in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 20 Mar 1901, 15:52 Wed. Since then the Sun has moved 138.4° round the stars. Vikram Samvat numbers that year 1958; Shaka Samvat numbers it 1823.