Panchang in Sevan, Gegharkunik, Armenia Wed 11 May 1983

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 02:47 on Wed 11 May to 01:52 on Thu 12 May, so it touches only Wednesday night’s nishitha (01:36 Thu–02:15 Thu). 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, 06:48 here. Trayodashi ended at 02:47, before it. Chaturdashi ends at 01:52 Thu, when the lead reaches 348°. The lead passed 180° at the full moon of 27 Apr, so the Moon is waning: Krishna paksha.

The night of Tue 10 May ran from sunset 21:04 Tue to sunrise 06:48, 9 h 44 m. Cut into 15 muhurtas of 38 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:48 to 21:05, splits into 8 choghadiyas of 1 h 47 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 21:05 to 06:47 Thu, splits into 8 choghadiyas of 1 h 12 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′. Ashwini spans 0°00′–13°20′; the Moon entered its pada 2 at 3°20′. It leaves at 22:58, for Bharani.

Add the Sun's and the Moon's places among the stars: 26.2° + 4.3° = 30.5°. The sum, cut into 27 parts of 13°20′, gives the yoga: 26°40′–40°00′ is the 3rd, Ayushmana. It ends at 22:39, then Saubhagya.

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 14:24, when the lead reaches 342°; Shakuni until 01:52 Thu.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:48 to 06:47 Thu, so the hours after midnight still belong to Budhawara.

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: Meena gives Chaitra. The Sun enters Mesha on 14 Apr, inside the month. The next new moon, 13 May, finds it in Mesha and begins Vaishakha.

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 13 May, with the Sun in Mesha, begins Vaishakha. Until then this Krishna paksha reads Vaishakha here, and Chaitra in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 13 Apr 1983, 12:58 Wed. Since then the Sun has moved 27° round the stars. Vikram Samvat numbers that year 2040; Shaka Samvat numbers it 1905.