Panchang in Mapleton, Utah, United States Fri 10 Aug 2018

Amavasya follows the tithi at sunrise. Amavasya begins at 07:37 on Fri 10 Aug, after that sunrise, and ends at 03:57 on Sat 11 Aug, before the next: it holds no sunrise. A tithi that holds no sunrise is kept on the day it is current: Fri 10 Aug. 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 11:15 Thu, before it. Chaturdashi ends at 07:37, when the lead reaches 348°. The lead passed 180° at the full moon of 27 Jul, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise. Amavasya began at 07:37 and ended at 03:57 Sat, between the sunrises of 06:33 and 06:34 Sat. Friday reads Chaturdashi and Saturday reads Pratipada: Amavasya is a kshaya tithi here.

The night of Thu 9 Aug ran from sunset 20:30 Thu to sunrise 06:33, 10 h 3 m. Cut into 15 muhurtas of 40 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:33 to 20:29, splits into 8 choghadiyas of 1 h 44 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 20:29 to 06:34 Sat, splits into 8 choghadiyas of 1 h 15 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′. Pushya spans 93°20′–106°40′; the Moon entered its pada 3 at 100°. It leaves at 15:24, for Ashlesha.

Add the Sun's and the Moon's places among the stars: 113.7° + 101.1° = 214.8°. The sum, cut into 27 parts of 13°20′, gives the yoga: 213°20′–226°40′ is the 17th, Vyatipata. It ends at 00:14 Sat, then Variyana.

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 21:27 Thu, when the lead reached 342°; Shakuni runs until 07:37.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:33 to 06:34 Sat, so the hours after midnight still belong to Shukrawara.

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: Mithuna gives Ashadha. The Sun enters Karka on 16 Jul, inside the month. The next new moon, 11 Aug, finds it in Karka and begins Shravana.

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 Aug, with the Sun in Karka, begins Shravana. Until then this Krishna paksha reads Shravana here, and Ashadha in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 17 Mar 2018, 07:11 Sat. Since then the Sun has moved 140.9° round the stars. Vikram Samvat numbers that year 2075; Shaka Samvat numbers it 1940.