Panchang in Ipameri, Goiás, Brazil Thu 11 Jul 1912

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 20:36 on Thu 11 Jul to 17:30 on Fri 12 Jul, between the two evenings’ pradosha, touching neither. The Nirnayasindhu then takes the earlier day: Thu 11 Jul. No text giving Pradosh Vrat’s time was found; pradosha is Tithika’s convention.

Pradosh Vrat: every date in Ipameri

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, 06:44 here. Ekadashi ended at 23:13 Wed, before it. Dwadashi ends at 20:43, when the lead reaches 324°. The lead passed 180° at the full moon of 29 Jun, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 05:30, came before Ekadashi ended at 07:43: this day reads Ekadashi. Dwadashi ends at 05:13 Fri, before the next sunrise, so no day here reads Dwadashi: it is kshaya.

Ipameri · UTC−3

Sunrise here, 06:44, came after Ekadashi ended at 23:13 Wed: this day reads Dwadashi.

The night of Wed 10 Jul ran from sunset 17:51 Wed to sunrise 06:44, 12 h 52 m. Cut into 15 muhurtas of 51 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:44 to 17:52, splits into 8 choghadiyas of 1 h 23 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:52 to 06:44 Fri, splits into 8 choghadiyas of 1 h 36 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′. Rohini spans 40°00′–53°20′; the Moon entered its pada 1 at 40°. It leaves at 01:12 Fri, for Mrigashira.

Add the Sun's and the Moon's places among the stars: 86.1° + 42.2° = 128.3°. The sum, cut into 27 parts of 13°20′, gives the yoga: 120°00′–133°20′ is the 10th, Ganda. It ends at 14:41, then Vriddhi.

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 runs until 10:03, when the lead reaches 318°; Taitila until 20:43.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:44 to 06:44 Fri, so the hours after midnight still belong to Guruwara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 15 Jun 03:23 Sat to 14 Jul 10:12 Sun the Sun stayed in Mithuna, entering Karka at 15 Jul 10:02 Mon, after the new moon. A month with no sankranti is Adhika Ashadha, before Ashadha 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 Jul, with the Sun in Mithuna, begins Ashadha (Adhik). Until then this Krishna paksha reads Ashadha (Adhik) here, and Ashadha (Adhik) in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 18 Mar 1912, 19:08 Mon. Since then the Sun has moved 110.8° round the stars. Vikram Samvat numbers that year 1969; Shaka Samvat numbers it 1834.