Panchang in Ipameri, Goiás, Brazil Mon 26 Jan 1987

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 22:32 on Mon 26 Jan to 19:00 on Tue 27 Jan, between the two evenings’ pradosha, touching neither. The Nirnayasindhu then takes the earlier day: Mon 26 Jan. 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, 06:56 here. Ekadashi ended at 01:45, before it. Dwadashi ends at 22:32, when the lead reaches 324°. The lead passed 180° at the full moon of 15 Jan, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 07:12, came before Ekadashi ended at 09:15: this day reads Ekadashi. Dwadashi ends at 06:02 Tue, before the next sunrise, so no day here reads Dwadashi: it is kshaya.

Ipameri · UTC−2

Sunrise here, 06:56, came after Ekadashi ended at 01:45: this day reads Dwadashi.

The night of Sun 25 Jan ran from sunset 19:54 Sun to sunrise 06:56, 11 h 2 m. Cut into 15 muhurtas of 44 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:56 to 19:53, splits into 8 choghadiyas of 1 h 37 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:53 to 06:57 Tue, 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 fixed stars divide the Moon's path into 27 nakshatras of 13°20′, each in 4 padas of 3°20′. Jyeshtha spans 226°40′–240°00′; the Moon entered its pada 4 at 236°40′. It leaves at 11:32, for Mula.

Add the Sun's and the Moon's places among the stars: 282.2° + 237.2° = 519.4°, one full turn and 159.4°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 146°40′–160°00′ is the 12th, Dhruva. It ends at 07:56, then Vyaghata.

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 12:11, when the lead reaches 318°; Taitila until 22:32.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:56 to 06:57 Tue, so the hours after midnight still belong to Somawara.

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: Dhanu gives Pausha. The Sun enters Makara on 14 Jan, inside the month. The next new moon, 29 Jan, finds it in Makara and begins Magha.

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 29 Jan, with the Sun in Makara, begins Magha. Until then this Krishna paksha reads Magha here, and Pausha in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 9 Apr 1986, 03:08 Wed. Since then the Sun has moved 286.8° round the stars. Vikram Samvat numbers that year 2043; Shaka Samvat numbers it 1908.