Panchang in Sevan, Gegharkunik, Armenia Thu 15 Oct 2020

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 07:03 on Thu 15 Oct to 03:23 on Fri 16 Oct, so only Thursday night’s nishitha (00:20 Fri–01:11 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: 336°–348° is the 29th, Krishna Chaturdashi. A day takes the tithi in force at its sunrise, 07:11 here. Trayodashi ended at 07:03, before it. Chaturdashi ends at 03:23 Fri, when the lead reaches 348°. The lead passed 180° at the full moon of 2 Oct, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 06:22, came before Trayodashi ended at 08:33: this day reads Trayodashi. Chaturdashi ends at 04:53 Fri, before the next sunrise, so no day here reads Chaturdashi: it is kshaya.

Sevan · UTC+4

Sunrise here, 07:11, came after Trayodashi ended at 07:03: this day reads Chaturdashi.

The night of Wed 14 Oct ran from sunset 18:21 Wed to sunrise 07:11, 12 h 50 m. Cut into 15 muhurtas of 51 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:11 to 18:19, splits into 8 choghadiyas of 1 h 23 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:19 to 07:12 Fri, splits into 8 choghadiyas of 1 h 36 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′. Uttara Phalguni spans 146°40′–160°00′; the Moon entered its pada 3 at 153°20′. It leaves at 16:28, for Hasta.

Add the Sun's and the Moon's places among the stars: 178.1° + 154.2° = 332.3°. The sum, cut into 27 parts of 13°20′, gives the yoga: 320°00′–333°20′ is the 25th, Brahma. It ends at 08:49, then Indra.

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 17:15, when the lead reaches 342°; Shakuni until 03:23 Fri.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:11 to 07:12 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 17 Sep 15:00 Thu to 16 Oct 23:31 Fri the Sun stayed in Kanya, entering Tula at 17 Oct 05:35 Sat, after the new moon. A month with no sankranti is Adhika Ashwina, before Ashwina 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 Oct, with the Sun in Kanya, begins Ashwina (Adhik). Until then this Krishna paksha reads Ashwina (Adhik) here, and Ashwina (Adhik) in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 24 Mar 2020, 13:28 Tue. Since then the Sun has moved 198° round the stars. Vikram Samvat numbers that year 2077; Shaka Samvat numbers it 1942.