Panchang in Ipameri, Goiás, Brazil Wed 25 Feb 1953

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 09:13 on Wed 25 Feb to 11:41 on Thu 26 Feb, so only Wednesday’s pradosha (19:40–21:58) 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: 132°–144° is the 12th, Shukla Dwadashi. A day takes the tithi in force at its sunrise, 07:10 here. Ekadashi ended at 07:03 Tue, before it. Dwadashi ends at 09:13, when the lead reaches 144°. The lead passed 0° at the new moon of 13 Feb, so the Moon is waxing: Shukla paksha.

A day takes the tithi in force at its sunrise. Dwadashi began at 07:03 Tue, before sunrise at 07:10 Tue, and ends at 09:13, after the next sunrise at 07:10. Both days read Dwadashi: it is a vriddhi tithi here.

The night of Tue 24 Feb ran from sunset 19:41 Tue to sunrise 07:10, 11 h 29 m. Cut into 15 muhurtas of 45 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:10 to 19:40, splits into 8 choghadiyas of 1 h 33 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:40 to 07:11 Thu, splits into 8 choghadiyas of 1 h 26 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′. Pushya spans 93°20′–106°40′; the Moon entered its pada 1 at 93°20′. It leaves at 03:59 Thu, for Ashlesha.

Add the Sun's and the Moon's places among the stars: 313.3° + 96.3° = 409.6°, one full turn and 49.6°. 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 14:04, then Shobhana.

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 20:05 Tue, when the lead reached 138°; Balava runs until 09:13.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:10 to 07:11 Thu, so the hours after midnight still belong to Budhawara.

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: Kumbha gives Phalguna. The Sun enters Meena on 13 Mar, inside the month. The next new moon, 15 Mar, finds it in Meena and begins Chaitra.

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 13 Feb, with the Sun in Kumbha, began Phalguna. This Shukla paksha reads Phalguna in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 25 Mar 1952, 18:12 Tue. Since then the Sun has moved 331.4° round the stars. Vikram Samvat numbers that year 2009; Shaka Samvat numbers it 1874.