Panchang in Sevan, Gegharkunik, Armenia Thu 12 Aug 1920

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 13:11 on Thu 12 Aug to 09:51 on Fri 13 Aug, so only Thursday night’s nishitha (23:42–00:23 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, 05:06 here. Dwadashi ended at 16:33 Wed, before it. Trayodashi ends at 13:13, when the lead reaches 336°. The lead passed 180° at the full moon of 31 Jul, so the Moon is waning: Krishna paksha.

The night of Wed 11 Aug ran from sunset 19:03 Wed to sunrise 05:06, 10 h 3 m. Cut into 15 muhurtas of 40 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:06 to 19:02, splits into 8 choghadiyas of 1 h 44 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:02 to 05:07 Fri, splits into 8 choghadiyas of 1 h 15 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′. Punarvasu spans 80°00′–93°20′; the Moon entered its pada 3 at 86°40′. It leaves at 14:23, for Pushya.

Add the Sun's and the Moon's places among the stars: 116.3° + 87.6° = 203.9°. The sum, cut into 27 parts of 13°20′, gives the yoga: 200°00′–213°20′ is the 16th, Siddhi. It ends at 19:25, 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 ended at 02:54, when the lead reached 330°; Vanija runs until 13:13.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:06 to 05:07 Fri, so the hours after midnight still belong to Guruwara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 15 Jul 23:24 Thu to 14 Aug 06:43 Sat the Sun stayed in Karka, entering Simha at 16 Aug 01:42 Mon, after the new moon. A month with no sankranti is Adhika Shravana, before Shravana itself.

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 14 Aug, with the Sun in Karka, begins Shravana (Adhik). Until then this Krishna paksha reads Shravana (Adhik) here, and Shravana (Adhik) in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 20 Mar 1920, 13:55 Sat. Since then the Sun has moved 139.5° round the stars. Vikram Samvat numbers that year 1977; Shaka Samvat numbers it 1842.