Panchang in Sevan, Gegharkunik, Armenia Thu 20 Nov 2014

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 17:15 on Thu 20 Nov to 17:12 on Fri 21 Nov, so only Thursday night’s nishitha (00:17 Fri–01:14 Fri) falls within it. 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, 07:51 here. Dwadashi ended at 16:37 Wed, before it. Trayodashi ends at 17:15, when the lead reaches 336°. The lead passed 180° at the full moon of 7 Nov, so the Moon is waning: Krishna paksha.

The night of Wed 19 Nov ran from sunset 17:39 Wed to sunrise 07:51, 14 h 12 m. Cut into 15 muhurtas of 56 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:51 to 17:39, splits into 8 choghadiyas of 1 h 13 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:39 to 07:52 Fri, splits into 8 choghadiyas of 1 h 46 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′. Chitra spans 173°20′–186°40′; the Moon entered its pada 4 at 183°20′. It leaves at 10:53, for Swati.

Add the Sun's and the Moon's places among the stars: 213.7° + 185.1° = 398.8°, one full turn and 38.8°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 26°40′–40°00′ is the 3rd, Ayushmana. It ends at 10:04, then Saubhagya.

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 ended at 05:01, when the lead reached 330°; Vanija runs until 17:15.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:51 to 07:52 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: Tula gives Kartika. The Sun enters Vrishchika on 16 Nov, inside the month. The next new moon, 22 Nov, finds it in Vrishchika and begins Margashirsha.

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 22 Nov, with the Sun in Vrishchika, begins Margashirsha. Until then this Krishna paksha reads Margashirsha here, and Kartika in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 30 Mar 2014, 22:44 Sun. Since then the Sun has moved 227.8° round the stars. Vikram Samvat numbers that year 2071; Shaka Samvat numbers it 1936.