Panchang in Mapleton, Utah, United States Tue 25 Apr 2017

Amavasya follows the tithi at sunrise. Amavasya begins at 09:38 on Tue 25 Apr, after that sunrise, and ends at 06:16 on Wed 26 Apr, before the next: it holds no sunrise. A tithi that holds no sunrise is kept on the day it is current: Tue 25 Apr. No text giving Amavasya’s time was found; sunrise is Tithika’s convention.

Amavasya: every date in Mapleton

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 336°–348° is the 29th, Krishna Chaturdashi. A day takes the tithi in force at its sunrise, 06:33 here. Trayodashi ended at 12:34 Mon, before it. Chaturdashi ends at 09:38, when the lead reaches 348°. The lead passed 180° at the full moon of 11 Apr, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise. Amavasya began at 09:38 and ended at 06:16 Wed, between the sunrises of 06:33 and 06:32 Wed. Tuesday reads Chaturdashi and Wednesday reads Pratipada: Amavasya is a kshaya tithi here.

The night of Mon 24 Apr ran from sunset 20:14 Mon to sunrise 06:33, 10 h 19 m. Cut into 15 muhurtas of 41 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:33 to 20:15, splits into 8 choghadiyas of 1 h 42 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 20:15 to 06:32 Wed, splits into 8 choghadiyas of 1 h 17 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 4 at 356°40′. It leaves at 10:24, for Ashwini.

Add the Sun's and the Moon's places among the stars: 11.4° + 357.6° = 369°, one full turn and 9°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 0°00′–13°20′ is the 1st, Vishkambha. It ends at 13:07, then Priti.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Chaturdashi is Vishti and the second Shakuni. Vishti ended at 23:10 Mon, when the lead reached 342°; Shakuni runs until 09:38.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:33 to 06:32 Wed, so the hours after midnight still belong to Mangalawara.

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: Meena gives Chaitra. The Sun enters Mesha on 13 Apr, inside the month. The next new moon, 26 Apr, finds it in Mesha and begins Vaishakha.

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 26 Apr, with the Sun in Mesha, begins Vaishakha. Until then this Krishna paksha reads Vaishakha here, and Chaitra in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 27 Mar 2017, 20:57 Mon. Since then the Sun has moved 27.9° round the stars. Vikram Samvat numbers that year 2074; Shaka Samvat numbers it 1939.