Panchang in Ipameri, Goiás, Brazil Tue 30 Aug 1955

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 03:50 on Tue 30 Aug to 04:50 on Wed 31 Aug, so only Tuesday’s pradosha (18:05–20:32) 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: 144°–156° is the 13th, Shukla Trayodashi. A day takes the tithi in force at its sunrise, 06:21 here. Dwadashi ended at 03:50, before it. Trayodashi ends at 04:50 Wed, when the lead reaches 156°. The lead passed 0° at the new moon of 17 Aug, so the Moon is waxing: Shukla paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 05:57, came before Dwadashi ended at 12:20: this day reads Dwadashi.

Ipameri · UTC−3

Sunrise here, 06:21, came after Dwadashi ended at 03:50: this day reads Trayodashi.

The night of Mon 29 Aug ran from sunset 18:05 Mon to sunrise 06:21, 12 h 16 m. Cut into 15 muhurtas of 49 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:21 to 18:05, splits into 8 choghadiyas of 1 h 28 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:05 to 06:21 Wed, 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 fixed stars divide the Moon's path into 27 nakshatras of 13°20′, each in 4 padas of 3°20′. Uttara Ashadha spans 266°40′–280°00′; the Moon entered its pada 4 at 276°40′. It leaves at 09:52, for Shravana.

Add the Sun's and the Moon's places among the stars: 133° + 278.2° = 411.2°, one full turn and 51.2°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 40°00′–53°20′ is the 4th, Saubhagya. It ends at 10:13, then Shobhana.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Trayodashi is Kaulava and the second Taitila. Kaulava runs until 16:25, when the lead reaches 150°; Taitila until 04:50 Wed.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:21 to 06:21 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 17 Aug 16:58 Wed to 16 Sep 03:19 Fri the Sun stayed in Simha, entering Kanya at 16 Sep 18:46 Fri, after the new moon. A month with no sankranti is Adhika Bhadrapada, before Bhadrapada 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 17 Aug, with the Sun in Simha, began Bhadrapada (Adhik). This Shukla paksha reads Bhadrapada (Adhik) in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 24 Mar 1955, 00:42 Thu. Since then the Sun has moved 153.5° round the stars. Vikram Samvat numbers that year 2012; Shaka Samvat numbers it 1877.