Panchang in Davinópolis, Maranhão, Brazil Thu 22 Mar 2012

Amavasya follows the tithi at sunrise. Amavasya runs from 10:07 on Wed 21 Mar to 11:37 on Thu 22 Mar, so it holds sunrise only on Thu 22 Mar, at 06:13. 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, 06:13 here. Chaturdashi ended at 10:07 Wed, before it. Amavasya ends at 11:37, when the lead reaches 360°. The lead passed 180° at the full moon of 8 Mar, so the Moon is waning: Krishna paksha.

The night of Wed 21 Mar ran from sunset 18:19 Wed to sunrise 06:13, 11 h 54 m. Cut into 15 muhurtas of 47 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:13 to 18:19, 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, 18:19 to 06:13 Fri, splits into 8 choghadiyas of 1 h 29 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 Bhadrapada spans 333°20′–346°40′; the Moon entered its pada 1 at 333°20′. It leaves at 04:03 Fri, for Revati.

Add the Sun's and the Moon's places among the stars: 338.1° + 335.6° = 673.7°, one full turn and 313.7°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 306°40′–320°00′ is the 24th, Shukla. It ends at 17:39, then Brahma.

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 ended at 22:49 Wed, when the lead reached 354°; Nagava runs until 11:37.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:13 to 06:13 Fri, so the hours after midnight still belong to Guruwara.

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, 22 Mar, 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 22 Mar, 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: 3 Apr 2011, 11:32 Sun. Since then the Sun has moved 348.6° round the stars. Vikram Samvat numbers that year 2068; Shaka Samvat numbers it 1933.