Panchang in Sevan, Gegharkunik, Armenia Sat 14 Aug 1909

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 00:41 on Sat 14 Aug to 01:35 on Sun 15 Aug, so only Saturday night’s nishitha (23:42–00:23 Sun) 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: 336°–348° is the 29th, Krishna Chaturdashi. A day takes the tithi in force at its sunrise, 05:08 here. Trayodashi ended at 00:43, before it. Chaturdashi ends at 01:37 Sun, when the lead reaches 348°. The lead passed 180° at the full moon of 2 Aug, so the Moon is waning: Krishna paksha.

The night of Fri 13 Aug ran from sunset 19:01 Fri to sunrise 05:08, 10 h 7 m. Cut into 15 muhurtas of 40 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:08 to 19:00, 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, 19:00 to 05:09 Sun, splits into 8 choghadiyas of 1 h 16 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′. Pushya spans 93°20′–106°40′; the Moon entered its pada 1 at 93°20′. It leaves at 01:15 Sun, for Ashlesha.

Add the Sun's and the Moon's places among the stars: 118° + 96.2° = 214.2°. The sum, cut into 27 parts of 13°20′, gives the yoga: 213°20′–226°40′ is the 17th, Vyatipata. It ends at 03:19 Sun, then Variyana.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Chaturdashi is Vishti and the second Shakuni. Vishti runs until 13:07, when the lead reaches 342°; Shakuni until 01:37 Sun.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:08 to 05:09 Sun, so the hours after midnight still belong to Shaniwara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 17 Jul 13:44 Sat to 16 Aug 02:54 Mon the Sun stayed in Karka, entering Simha at 16 Aug 06:05 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 16 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: 21 Mar 1909, 23:11 Sun. Since then the Sun has moved 140° round the stars. Vikram Samvat numbers that year 1966; Shaka Samvat numbers it 1831.