Panchang in Ipameri, Goiás, Brazil Tue 16 May 1939

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 03:03 on Tue 16 May to 03:08 on Wed 17 May, so only Tuesday’s pradosha (17:47–20:20) 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: 324°–336° is the 28th, Krishna Trayodashi. A day takes the tithi in force at its sunrise, 06:30 here. Dwadashi ended at 03:03, before it. Trayodashi ends at 03:08 Wed, when the lead reaches 336°. The lead passed 180° at the full moon of 3 May, 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 Dwadashi ended at 11:33: this day reads Dwadashi.

Ipameri · UTC−3

Sunrise here, 06:30, came after Dwadashi ended at 03:03: this day reads Trayodashi.

The night of Mon 15 May ran from sunset 17:47 Mon to sunrise 06:30, 12 h 43 m. Cut into 15 muhurtas of 50 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:30 to 17:47, splits into 8 choghadiyas of 1 h 24 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:47 to 06:30 Wed, splits into 8 choghadiyas of 1 h 35 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′. Revati spans 346°40′–360°00′; the Moon entered its pada 4 at 356°40′. It leaves at 11:31, for Ashwini.

Add the Sun's and the Moon's places among the stars: 31.6° + 357.3° = 388.9°, one full turn and 28.9°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 26°40′–40°00′ is the 3rd, Ayushmana. It ends at 01:37 Wed, then Saubhagya.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Trayodashi is Garaja and the second Vanija. Garaja runs until 15:10, when the lead reaches 330°; Vanija until 03:08 Wed.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:30 to 06:30 Wed, so the hours after midnight still belong to Mangalawara.

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: Mesha gives Vaishakha. The Sun enters Vrishabha on 14 May, inside the month. The next new moon, 19 May, finds it in Vrishabha and begins Jyeshtha.

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 19 May, with the Sun in Vrishabha, begins Jyeshtha. Until then this Krishna paksha reads Jyeshtha here, and Vaishakha in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 20 Mar 1939, 22:49 Mon. Since then the Sun has moved 55.1° round the stars. Vikram Samvat numbers that year 1996; Shaka Samvat numbers it 1861.