Panchang in Sevan, Gegharkunik, Armenia Tue 25 Apr 1972

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 09:49 on Tue 25 Apr to 12:00 on Wed 26 Apr, so only Tuesday’s pradosha (19:49–21:52) 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: 132°–144° is the 12th, Shukla Dwadashi. A day takes the tithi in force at its sunrise, 06:07 here. Ekadashi ended at 07:52 Mon, before it. Dwadashi ends at 09:49, when the lead reaches 144°. The lead passed 0° at the new moon of 14 Apr, so the Moon is waxing: Shukla paksha.

The night of Mon 24 Apr ran from sunset 19:48 Mon to sunrise 06:07, 10 h 19 m. Cut into 15 muhurtas of 41 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:07 to 19:49, splits into 8 choghadiyas of 1 h 42 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:49 to 06:05 Wed, splits into 8 choghadiyas of 1 h 17 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′. Uttara Phalguni spans 146°40′–160°00′; the Moon entered its pada 3 at 153°20′. It leaves at 18:31, for Hasta.

Add the Sun's and the Moon's places among the stars: 11.5° + 153.8° = 165.3°. The sum, cut into 27 parts of 13°20′, gives the yoga: 160°00′–173°20′ is the 13th, Vyaghata. It ends at 20:59, then Harshana.

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 20:48 Mon, when the lead reached 138°; Balava runs until 09:49.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:07 to 06:05 Wed, so the hours after midnight still belong to Mangalawara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 14 Apr 00:30 Fri to 13 May 08:08 Sat the Sun stayed in Mesha, entering Vrishabha at 14 May 08:26 Sun, after the new moon. A month with no sankranti is Adhika Vaishakha, before Vaishakha 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 Apr, with the Sun in Mesha, began Vaishakha (Adhik). This Shukla paksha reads Vaishakha (Adhik) in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 15 Mar 1972, 15:34 Wed. Since then the Sun has moved 40° round the stars. Vikram Samvat numbers that year 2029; Shaka Samvat numbers it 1894.