Panchang in Davinópolis, Maranhão, Brazil Sun 17 Dec 2017

Amavasya follows the tithi at sunrise. Amavasya runs from 00:59 on Sun 17 Dec to 03:30 on Mon 18 Dec, so it holds sunrise only on Sun 17 Dec, at 05:52. No text giving Amavasya’s time was found; sunrise is Tithika’s convention.

Amavasya: every date in Davinópolis

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, 05:52 here. Chaturdashi ended at 00:59, before it. Amavasya ends at 03:30 Mon, when the lead reaches 360°. The lead passed 180° at the full moon of 3 Dec, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 07:07, came before Chaturdashi ended at 09:29: this day reads Chaturdashi.

Davinópolis · UTC−3

Sunrise here, 05:52, came after Chaturdashi ended at 00:59: this day reads Amavasya.

The night of Sat 16 Dec ran from sunset 18:18 Sat to sunrise 05:52, 11 h 34 m. Cut into 15 muhurtas of 46 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:52 to 18:19, splits into 8 choghadiyas of 1 h 33 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 05:53 Mon, splits into 8 choghadiyas of 1 h 26 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′. Jyeshtha spans 226°40′–240°00′; the Moon entered its pada 2 at 230°. It leaves at 22:36, for Mula.

Add the Sun's and the Moon's places among the stars: 241.5° + 231.7° = 473.2°, one full turn and 113.2°. 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 18:29, then Ganda.

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 runs until 14:13, when the lead reaches 354°; Nagava until 03:30 Mon.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:52 to 05:53 Mon, so the hours after midnight still belong to Raviwara.

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: Vrishchika gives Margashirsha. The Sun enters Dhanu on 15 Dec, inside the month. The next new moon, 18 Dec, finds it in Dhanu and begins Pausha.

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 Dec, with the Sun in Dhanu, begins Pausha. Until then this Krishna paksha reads Pausha here, and Margashirsha in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 27 Mar 2017, 23:57 Mon. Since then the Sun has moved 258° round the stars. Vikram Samvat numbers that year 2074; Shaka Samvat numbers it 1939.