Panchang in Sevan, Gegharkunik, Armenia Sat 19 Sep 2009

Ghatasthapana is done in pratahkala, the first fifth of the day. Pratipada runs from 23:44 on Fri 18 Sep to 21:21 on Sat 19 Sep, so only Saturday’s pratahkala (07:44–10:12) falls within it.

Sharad Navratri: every date in Sevan

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 0°–12° is the 1st, Shukla Pratipada. A day takes the tithi in force at its sunrise, 07:44 here. Amavasya ended at 23:44 Fri, before it. Pratipada ends at 21:21, when the lead reaches 12°. The lead passed 0° at the new moon of 18 Sep, so the Moon is waxing: Shukla paksha.

The night of Fri 18 Sep ran from sunset 20:04 Fri to sunrise 07:44, 11 h 40 m. Cut into 15 muhurtas of 46 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:44 to 20:02, splits into 8 choghadiyas of 1 h 32 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 20:02 to 07:45 Sun, splits into 8 choghadiyas of 1 h 27 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 4 at 156°40′. It leaves at 13:08, for Hasta.

Add the Sun's and the Moon's places among the stars: 152.3° + 156.8° = 309.1°. The sum, cut into 27 parts of 13°20′, gives the yoga: 306°40′–320°00′ is the 24th, Shukla. It ends at 00:57 Sun, then Brahma.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Pratipada is Kinstughna and the second Bava. Kinstughna runs until 10:29, when the lead reaches 6°; Bava until 21:21.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:44 to 07:45 Sun, so the hours after midnight still belong to Shaniwara.

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: Kanya gives Ashwina. The Sun enters Tula on 17 Oct, inside the month. The next new moon, 18 Oct, finds it in Tula and begins Kartika.

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 18 Sep, with the Sun in Kanya, began Ashwina. This Shukla paksha reads Ashwina in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 26 Mar 2009, 20:05 Thu. Since then the Sun has moved 170.2° round the stars. Vikram Samvat numbers that year 2066; Shaka Samvat numbers it 1931.