Panchang in Myshkin, Yaroslavl Oblast, Russia Sat 29 Jun 1985

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 23:47 on Sat 29 Jun to 21:05 on Sun 30 Jun, between the two evenings’ pradosha, touching neither. The Nirnayasindhu then takes the earlier day: Sat 29 Jun. No text giving Pradosh Vrat’s time was found; pradosha is Tithika’s convention.

Pradosh Vrat: every date in Myshkin

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, 04:27 here. Ekadashi ended at 02:30, before it. Dwadashi ends at 23:47, when the lead reaches 144°. The lead passed 0° at the new moon of 18 Jun, so the Moon is waxing: Shukla paksha.

The night of Fri 28 Jun ran from sunset 22:30 Fri to sunrise 04:27, 5 h 57 m. Cut into 15 muhurtas of 23 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 04:27 to 22:30, splits into 8 choghadiyas of 2 h 15 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 22:30 to 04:28 Sun, splits into 8 choghadiyas of 44 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′. Vishakha spans 200°00′–213°20′; the Moon entered its pada 3 at 206°40′. It leaves at 15:30, for Anuradha.

Add the Sun's and the Moon's places among the stars: 73.6° + 206.7° = 280.3°. The sum, cut into 27 parts of 13°20′, gives the yoga: 280°00′–293°20′ is the 22nd, Sadhya. It ends at 00:49 Sun, then Shubha.

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 runs until 13:09, when the lead reaches 138°; Balava until 23:47.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 04:27 to 04:28 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: Mithuna gives Ashadha. The Sun enters Karka on 16 Jul, inside the month. The next new moon, 18 Jul, finds it in Karka and begins Shravana.

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 18 Jun, with the Sun in Mithuna, began Ashadha. This Shukla paksha reads Ashadha in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 21 Mar 1985, 14:58 Thu. Since then the Sun has moved 96.4° round the stars. Vikram Samvat numbers that year 2042; Shaka Samvat numbers it 1907.