Panchang in Sevan, Gegharkunik, Armenia Thu 31 Mar 2011

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 12:09 on Thu 31 Mar to 14:35 on Fri 1 Apr, so only Thursday’s pradosha (20:22–22:39) falls within it. 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, 07:46 here. Ekadashi ended at 09:51 Wed, before it. Dwadashi ends at 12:09, when the lead reaches 324°. The lead passed 180° at the full moon of 19 Mar, so the Moon is waning: Krishna paksha.

The night of Wed 30 Mar ran from sunset 20:21 Wed to sunrise 07:46, 11 h 25 m. Cut into 15 muhurtas of 45 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:46 to 20:22, splits into 8 choghadiyas of 1 h 34 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 20:22 to 07:44 Fri, splits into 8 choghadiyas of 1 h 25 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′. Shatabhisha spans 306°40′–320°00′; the Moon entered its pada 1 at 306°40′. It leaves at 07:55 Fri, for Purva Bhadrapada.

Add the Sun's and the Moon's places among the stars: 346° + 308° = 654°, one full turn and 294°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 293°20′–306°40′ is the 23rd, Shubha. It ends at 07:15 Fri, then Shukla.

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 ended at 22:58 Wed, when the lead reached 318°; Taitila runs until 12:09.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:46 to 07:44 Fri, so the hours after midnight still belong to Guruwara.

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 15 Mar, inside the month. The next new moon, 3 Apr, 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 3 Apr, 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: 16 Mar 2010, 01:01 Tue. Since then the Sun has moved 374.8° round the stars. Vikram Samvat numbers that year 2067; Shaka Samvat numbers it 1932.