Panchang in Mapleton, Utah, United States Wed 14 Mar 2018

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 04:15 on Wed 14 Mar to 05:49 on Thu 15 Mar, so only Wednesday’s pradosha (19:32–21:57) falls within it. No text giving Pradosh Vrat’s time was found; pradosha is Tithika’s convention.

Pradosh Vrat: every date in Mapleton

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, 07:39 here. Dwadashi ended at 04:15, before it. Trayodashi ends at 05:49 Thu, when the lead reaches 336°. The lead passed 180° at the full moon of 1 Mar, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 06:32, came before Dwadashi ended at 15:45: this day reads Dwadashi.

Mapleton · UTC−6

Sunrise here, 07:39, came after Dwadashi ended at 04:15: this day reads Trayodashi.

The night of Tue 13 Mar ran from sunset 19:31 Tue to sunrise 07:39, 12 h 8 m. Cut into 15 muhurtas of 48 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:39 to 19:32, splits into 8 choghadiyas of 1 h 29 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:32 to 07:37 Thu, splits into 8 choghadiyas of 1 h 30 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′. Dhanishtha spans 293°20′–306°40′; the Moon entered its pada 1 at 293°20′. It leaves at 05:42 Thu, for Shatabhisha.

Add the Sun's and the Moon's places among the stars: 329.8° + 295.4° = 625.2°, one full turn and 265.2°. 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 10:19, then Siddha.

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 17:06, when the lead reaches 330°; Vanija until 05:49 Thu.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:39 to 07:37 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 14 Mar, inside the month. The next new moon, 17 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 17 Mar, with the Sun in Meena, begins Chaitra. Until then this Krishna paksha reads Chaitra here, and Phalguna in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 27 Mar 2017, 20:57 Mon. Since then the Sun has moved 346.3° round the stars. Vikram Samvat numbers that year 2074; Shaka Samvat numbers it 1939.