Panchang in Sevan, Gegharkunik, Armenia Wed 26 Feb 2014

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 22:14 on Wed 26 Feb to 18:48 on Thu 27 Feb, between the two evenings’ pradosha, touching neither. The Nirnayasindhu then takes the earlier day: Wed 26 Feb. No text giving Pradosh Vrat’s time was found; pradosha is Tithika’s convention.

Pradosh Vrat: every date in Sevan

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, 07:38 here. Ekadashi ended at 01:28, before it. Dwadashi ends at 22:14, when the lead reaches 324°. The lead passed 180° at the full moon of 15 Feb, so the Moon is waning: Krishna paksha.

The night of Tue 25 Feb ran from sunset 18:46 Tue to sunrise 07:38, 12 h 52 m. Cut into 15 muhurtas of 51 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:38 to 18:47, 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 night here, 18:47 to 07:37 Thu, splits into 8 choghadiyas of 1 h 36 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 1 at 266°40′. It leaves at 01:26 Thu, for Shravana.

Add the Sun's and the Moon's places among the stars: 313.4° + 268.9° = 582.3°, one full turn and 222.3°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 213°20′–226°40′ is the 17th, Vyatipata. It ends at 14:11, then Variyana.

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 11:53, when the lead reaches 318°; Taitila until 22:14.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:38 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: Makara gives Magha. The Sun enters Kumbha on 13 Feb, inside the month. The next new moon, 1 Mar, finds it in Kumbha and begins Phalguna.

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 1 Mar, with the Sun in Kumbha, begins Phalguna. Until then this Krishna paksha reads Phalguna here, and Magha in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 10 Apr 2013, 13:35 Wed. Since then the Sun has moved 316.8° round the stars. Vikram Samvat numbers that year 2070; Shaka Samvat numbers it 1935.