Panchang in Ipameri, Goiás, Brazil Mon 16 Nov 2015

The evening arghya is offered at sunset. Shashthi runs from 18:52 on Mon 16 Nov to 18:13 on Tue 17 Nov, so it holds sunset only on Mon 16 Nov, at 19:26. No text giving Chhath · Sandhya Arghya’s time was found; sunset is Tithika’s convention.

Chhath: every date in Ipameri

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 48°–60° is the 5th, Shukla Panchami. A day takes the tithi in force at its sunrise, 06:29 here. Chaturthi ended at 19:06 Sun, before it. Panchami ends at 18:52, when the lead reaches 60°. The lead passed 0° at the new moon of 11 Nov, so the Moon is waxing: Shukla paksha.

The night of Sun 15 Nov ran from sunset 19:25 Sun to sunrise 06:29, 11 h 4 m. Cut into 15 muhurtas of 44 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:29 to 19:26, splits into 8 choghadiyas of 1 h 37 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 19:26 to 06:28 Tue, splits into 8 choghadiyas of 1 h 22 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′. Purva Ashadha spans 253°20′–266°40′; the Moon entered its pada 3 at 260°. It leaves at 12:38, for Uttara Ashadha.

Add the Sun's and the Moon's places among the stars: 209.6° + 263.3° = 472.9°, one full turn and 112.9°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 106°40′–120°00′ is the 9th, Shula. It ends at 18:33, then Ganda.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Panchami is Bava and the second Balava. Bava runs until 07:02, when the lead reaches 54°; Balava until 18:52.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:29 to 06:28 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: Tula gives Kartika. The Sun enters Vrishchika on 16 Nov, inside the month. The next new moon, 11 Dec, finds it in Vrishchika and begins Margashirsha.

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 11 Nov, with the Sun in Tula, began Kartika. This Shukla paksha reads Kartika in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 20 Mar 2015, 06:36 Fri. Since then the Sun has moved 234.2° round the stars. Vikram Samvat numbers that year 2072; Shaka Samvat numbers it 1937.