Panchang in Sevan, Gegharkunik, Armenia Mon 13 May 2075

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 00:38 on Mon 13 May to 01:48 on Tue 14 May, touching nishitha on both nights. The Nirnayasindhu takes the night it holds more of: Mon 13 May. 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, 05:45 here. Trayodashi ended at 00:38, before it. Chaturdashi ends at 01:48 Tue, when the lead reaches 348°. The lead passed 180° at the full moon of 30 Apr, so the Moon is waning: Krishna paksha.

The night of Sun 12 May ran from sunset 20:06 Sun to sunrise 05:45, 9 h 39 m. Cut into 15 muhurtas of 38 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:45 to 20:07, 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, 20:07 to 05:44 Tue, 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 19:53, for Bharani.

Add the Sun's and the Moon's places among the stars: 27.6° + 6° = 33.6°. The sum, cut into 27 parts of 13°20′, gives the yoga: 26°40′–40°00′ is the 3rd, Ayushmana. It ends at 17:14, 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 13:10, when the lead reaches 342°; Shakuni until 01:48 Tue.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:45 to 05:44 Tue, so the hours after midnight still belong to Somawara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 15 Apr 12:56 Mon to 15 May 03:23 Wed the Sun stayed in Mesha, entering Vrishabha at 15 May 18:09 Wed, after the new moon. A month with no sankranti is Adhika Vaishakha, before Vaishakha 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 15 May, with the Sun in Mesha, begins Vaishakha (Adhik). Until then this Krishna paksha reads Vaishakha (Adhik) here, and Vaishakha (Adhik) in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 16 Mar 2075, 23:26 Sat. Since then the Sun has moved 56.2° round the stars. Vikram Samvat numbers that year 2132; Shaka Samvat numbers it 1997.