Panchang in Sevan, Gegharkunik, Armenia Mon 12 Apr 2021

Ghatasthapana is done in pratahkala, the first fifth of the day. Pratipada runs from 06:30 on Mon 12 Apr to 08:47 on Tue 13 Apr, touching pratahkala on both mornings. The Nirnayasindhu takes the morning it holds more of: Mon 12 Apr. No text giving Chaitra Navratri · Ghatasthapana’s time was found; pratahkala is Tithika’s convention.

Chaitra Navratri: every date in Sevan

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 348°–360° is the 30th, Krishna Amavasya. A day takes the tithi in force at its sunrise, 06:26 here. Chaturdashi ended at 04:33 Sun, before it. Amavasya ends at 06:30, when the lead reaches 360°. The lead passed 180° at the full moon of 28 Mar, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise. Amavasya began at 04:33 Sun, before sunrise at 06:27 Sun, and ends at 06:30, after the next sunrise at 06:26. Both days read Amavasya: it is a vriddhi tithi here.

The night of Sun 11 Apr ran from sunset 19:34 Sun to sunrise 06:26, 10 h 52 m. Cut into 15 muhurtas of 43 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:26 to 19:36, splits into 8 choghadiyas of 1 h 38 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:36 to 06:24 Tue, splits into 8 choghadiyas of 1 h 21 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′. Revati spans 346°40′–360°00′; the Moon entered its pada 4 at 356°40′. It leaves at 09:59, for Ashwini.

Add the Sun's and the Moon's places among the stars: 358.3° + 358.2° = 716.5°, one full turn and 356.5°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 346°40′–360°00′ is the 27th, Vaidhriti. It ends at 12:56, then Vishkambha.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Amavasya is Chatushpada and the second Nagava. Chatushpada ended at 17:29 Sun, when the lead reached 354°; Nagava runs until 06:30.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:26 to 06:24 Tue, so the hours after midnight still belong to Somawara.

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: Kumbha gives Phalguna. The Sun enters Meena on 14 Mar, inside the month. The next new moon, 12 Apr, finds it in Meena and begins Chaitra.

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 12 Apr, with the Sun in Meena, begins Chaitra. Until then this Krishna paksha reads Chaitra here, and Phalguna 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 378.2° round the stars. Vikram Samvat numbers that year 2077; Shaka Samvat numbers it 1942.