Panchang in Davinópolis, Maranhão, Brazil Sun 11 Apr 2021

Amavasya follows the tithi at sunrise. Amavasya runs from 21:33 on Sat 10 Apr to 23:30 on Sun 11 Apr, so it holds sunrise only on Sun 11 Apr, at 06:10. 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, 06:10 here. Chaturdashi ended at 21:33 Sat, before it. Amavasya ends at 23:30, 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.

New Delhi · IST

Sunrise here, 06:00, came before Chaturdashi ended at 06:03: this day reads Chaturdashi.

Davinópolis · UTC−3

Sunrise here, 06:10, came after Chaturdashi ended at 21:33 Sat: this day reads Amavasya.

The night of Sat 10 Apr ran from sunset 18:10 Sat to sunrise 06:10, 12 h 0 m. Cut into 15 muhurtas of 48 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:10 to 18:10, splits into 8 choghadiyas of 1 h 30 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:10 to 06:10 Mon, splits into 8 choghadiyas of 1 h 30 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 1 at 346°40′. It leaves at 02:59 Mon, for Ashwini.

Add the Sun's and the Moon's places among the stars: 357.6° + 349.6° = 707.2°, one full turn and 347.2°. 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 05:56 Mon, 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 runs until 10:29, when the lead reaches 354°; Nagava until 23:30.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:10 to 06:10 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: Kumbha gives Phalguna. The Sun enters Meena on 14 Mar, inside the month. The next new moon, 11 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 11 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, 06:28 Tue. Since then the Sun has moved 377.5° round the stars. Vikram Samvat numbers that year 2077; Shaka Samvat numbers it 1942.