Panchang in Sevan, Gegharkunik, Armenia Sun 10 Feb 1907

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 04:52 on Sun 10 Feb to 02:00 on Mon 11 Feb, so only Sunday’s pradosha (17:25–20:08) falls within it. No text giving Pradosh Vrat’s time was found; pradosha is Tithika’s convention.

Pradosh Vrat: every date in Sevan

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 02:00 on Mon 11 Feb to 23:14 on Mon 11 Feb, between the two nights’ nishitha, touching neither. The Nirnayasindhu then takes the earlier day: Sun 10 Feb. No text giving Masik Shivratri’s time was found; nishitha is Tithika’s convention.

Masik Shivratri: 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, 07:01 here. Dwadashi ended at 04:54, before it. Trayodashi ends at 02:02 Mon, when the lead reaches 336°. The lead passed 180° at the full moon of 29 Jan, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 07:04, came before Dwadashi ended at 07:24: this day reads Dwadashi. Trayodashi ends at 04:32 Mon, before the next sunrise, so no day here reads Trayodashi: it is kshaya.

Sevan · UTC+3

Sunrise here, 07:01, came after Dwadashi ended at 04:54: this day reads Trayodashi.

The night of Sat 9 Feb ran from sunset 17:26 Sat to sunrise 07:01, 13 h 35 m. Cut into 15 muhurtas of 54 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:01 to 17:27, splits into 8 choghadiyas of 1 h 18 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:27 to 07:00 Mon, splits into 8 choghadiyas of 1 h 41 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′. Purva Ashadha spans 253°20′–266°40′; the Moon entered its pada 3 at 260°. It leaves at 13:09, for Uttara Ashadha.

Add the Sun's and the Moon's places among the stars: 297.7° + 262.9° = 560.6°, one full turn and 200.6°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 200°00′–213°20′ is the 16th, Siddhi. It ends at 02:28 Mon, then Vyatipata.

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 15:28, when the lead reaches 330°; Vanija until 02:02 Mon.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:01 to 07:00 Mon, so the hours after midnight still belong to Raviwara.

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 12 Feb, inside the month. The next new moon, 12 Feb, 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 12 Feb, 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: 25 Mar 1906, 02:51 Sun. Since then the Sun has moved 316.8° round the stars. Vikram Samvat numbers that year 1963; Shaka Samvat numbers it 1828.