Panchang in Ipameri, Goiás, Brazil Thu 11 Mar 1926

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 10:49 on Thu 11 Mar to 07:25 on Fri 12 Mar, so only Thursday’s pradosha (18:31–20:51) falls within it. 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, 06:14 here. Ekadashi ended at 13:54 Wed, before it. Dwadashi ends at 10:49, when the lead reaches 324°. The lead passed 180° at the full moon of 27 Feb, so the Moon is waning: Krishna paksha.

The night of Wed 10 Mar ran from sunset 18:32 Wed to sunrise 06:14, 11 h 42 m. Cut into 15 muhurtas of 46 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:14 to 18:31, splits into 8 choghadiyas of 1 h 32 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:31 to 06:14 Fri, splits into 8 choghadiyas of 1 h 27 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′. Shravana spans 280°00′–293°20′; the Moon entered its pada 3 at 286°40′. It leaves at 13:54, for Dhanishtha.

Add the Sun's and the Moon's places among the stars: 327.2° + 288.6° = 615.8°, one full turn and 255.8°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 253°20′–266°40′ is the 20th, Shiva. It ends at 22:36, then Siddha.

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 00:24, when the lead reached 318°; Taitila runs until 10:49.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:14 to 06:14 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 12 Feb 14:20 Fri to 14 Mar 00:20 Sun the Sun stayed in Kumbha, entering Meena at 14 Mar 00:53 Sun, after the new moon. A month with no sankranti is Adhika Phalguna, before Phalguna 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 Mar, with the Sun in Kumbha, begins Phalguna (Adhik). Until then this Krishna paksha reads Phalguna (Adhik) here, and Phalguna (Adhik) in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 24 Mar 1925, 11:02 Tue. Since then the Sun has moved 346.6° round the stars. Vikram Samvat numbers that year 1982; Shaka Samvat numbers it 1847.