Panchang in Sevan, Gegharkunik, Armenia Tue 12 Jan 2010

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 04:36 on Tue 12 Jan to 06:28 on Wed 13 Jan, so only Tuesday’s pradosha (17:54–20:47) 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: 324°–336° is the 28th, Krishna Trayodashi. A day takes the tithi in force at its sunrise, 08:22 here. Dwadashi ended at 04:36, before it. Trayodashi ends at 06:28 Wed, when the lead reaches 336°. The lead passed 180° at the full moon of 31 Dec, so the Moon is waning: Krishna paksha.

The night of Mon 11 Jan ran from sunset 17:53 Mon to sunrise 08:22, 14 h 29 m. Cut into 15 muhurtas of 57 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 08:22 to 17:54, splits into 8 choghadiyas of 1 h 11 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:54 to 08:22 Wed, splits into 8 choghadiyas of 1 h 48 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 3 at 233°20′. It leaves at 20:59, for Mula.

Add the Sun's and the Moon's places among the stars: 267.8° + 233.6° = 501.4°, one full turn and 141.4°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 133°20′–146°40′ is the 11th, Vriddhi. It ends at 17:51, then Dhruva.

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 17:29, when the lead reaches 330°; Vanija until 06:28 Wed.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 08:22 to 08:22 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: Dhanu gives Pausha. The Sun enters Makara on 14 Jan, inside the month. The next new moon, 15 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 15 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: 26 Mar 2009, 20:05 Thu. Since then the Sun has moved 285.7° round the stars. Vikram Samvat numbers that year 2066; Shaka Samvat numbers it 1931.