Panchang in Sevan, Gegharkunik, Armenia Sat 24 Feb 1979

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 07:28 on Sat 24 Feb to 04:00 on Sun 25 Feb, so only Saturday’s pradosha (18:44–21:20) 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 04:00 on Sun 25 Feb to 00:22 on Mon 26 Feb, between the two nights’ nishitha, touching neither. The Nirnayasindhu then takes the earlier day: Sat 24 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, 07:42 here. Dwadashi ended at 07:28, before it. Trayodashi ends at 04:00 Sun, when the lead reaches 336°. The lead passed 180° at the full moon of 12 Feb, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 06:52, came before Dwadashi ended at 08:58: this day reads Dwadashi. Trayodashi ends at 05:30 Sun, before the next sunrise, so no day here reads Trayodashi: it is kshaya.

Sevan · UTC+4

Sunrise here, 07:42, came after Dwadashi ended at 07:28: this day reads Trayodashi.

The night of Fri 23 Feb ran from sunset 18:43 Fri to sunrise 07:42, 12 h 59 m. Cut into 15 muhurtas of 51 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:42 to 18:44, splits into 8 choghadiyas of 1 h 22 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:44 to 07:41 Sun, splits into 8 choghadiyas of 1 h 37 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 3 at 273°20′. It leaves at 14:54, for Shravana.

Add the Sun's and the Moon's places among the stars: 311.4° + 275.5° = 586.9°, one full turn and 226.9°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 226°40′–240°00′ is the 18th, Variyana. It ends at 03:21 Sun, then Parigha.

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 17:46, when the lead reaches 330°; Vanija until 04:00 Sun.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:42 to 07:41 Sun, so the hours after midnight still belong to Shaniwara.

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, 26 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 26 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: 7 Apr 1978, 19:15 Fri. Since then the Sun has moved 317.5° round the stars. Vikram Samvat numbers that year 2035; Shaka Samvat numbers it 1900.