Panchang in Davinópolis, Maranhão, Brazil Sat 5 Oct 2013

Ghatasthapana is done in pratahkala, the first fifth of the day. Pratipada runs from 21:34 on Fri 4 Oct to 20:33 on Sat 5 Oct, so only Saturday’s pratahkala (05:52–08:18) falls within it.

Sharad Navratri: every date in Davinópolis

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, 05:52 here. Amavasya ended at 21:34 Fri, before it. Pratipada ends at 20:33, when the lead reaches 12°. The lead passed 0° at the new moon of 4 Oct, so the Moon is waxing: Shukla paksha.

The night of Fri 4 Oct ran from sunset 18:03 Fri to sunrise 05:52, 11 h 49 m. Cut into 15 muhurtas of 47 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:52 to 18:03, splits into 8 choghadiyas of 1 h 31 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:03 to 05:52 Sun, splits into 8 choghadiyas of 1 h 28 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′. Hasta spans 160°00′–173°20′; the Moon entered its pada 4 at 170°. It leaves at 07:17, for Chitra.

Add the Sun's and the Moon's places among the stars: 168.2° + 172.5° = 340.7°. The sum, cut into 27 parts of 13°20′, gives the yoga: 333°20′–346°40′ is the 26th, Indra. It ends at 15:37, then Vaidhriti.

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 09:07, when the lead reaches 6°; Bava until 20:33.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:52 to 05:52 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, 3 Nov, 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 4 Oct, 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: 10 Apr 2013, 06:35 Wed. Since then the Sun has moved 171.6° round the stars. Vikram Samvat numbers that year 2070; Shaka Samvat numbers it 1935.