Panchang in Ipameri, Goiás, Brazil Mon 17 May 1920

Vat Savitri Vrat follows the tithi at sunrise. Amavasya begins at 06:46 on Mon 17 May, after that sunrise, and ends at 03:24 on Tue 18 May, before the next: it holds no sunrise. A tithi that holds no sunrise is kept on the day it is current: Mon 17 May. No text giving Vat Savitri Vrat’s time was found; sunrise is Tithika’s convention.

Vat Savitri Vrat: every date in Ipameri

Amavasya follows the tithi at sunrise. Amavasya begins at 06:46 on Mon 17 May, after that sunrise, and ends at 03:24 on Tue 18 May, before the next: it holds no sunrise. A tithi that holds no sunrise is kept on the day it is current: Mon 17 May. No text giving Amavasya’s time was found; sunrise is Tithika’s convention.

Amavasya: every date in Ipameri

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, 06:30 here. Trayodashi ended at 09:46 Sun, before it. Chaturdashi ends at 06:46, when the lead reaches 348°. The lead passed 180° at the full moon of 2 May, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise. Amavasya began at 06:46 and ended at 03:24 Tue, between the sunrises of 06:30 and 06:31 Tue. Monday reads Chaturdashi and Tuesday reads Pratipada: Amavasya is a kshaya tithi here.

The night of Sun 16 May ran from sunset 17:47 Sun to sunrise 06:30, 12 h 43 m. Cut into 15 muhurtas of 50 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:30 to 17:46, splits into 8 choghadiyas of 1 h 24 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:46 to 06:31 Tue, splits into 8 choghadiyas of 1 h 35 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′. Bharani spans 13°20′–26°40′; the Moon entered its pada 3 at 20°. It leaves at 15:14, for Krittika.

Add the Sun's and the Moon's places among the stars: 33.4° + 21.3° = 54.7°. The sum, cut into 27 parts of 13°20′, gives the yoga: 53°20′–66°40′ is the 5th, Shobhana. It ends at 00:39 Tue, then Atiganda.

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 20:19 Sun, when the lead reached 342°; Shakuni runs until 06:46.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:30 to 06:31 Tue, so the hours after midnight still belong to Somawara.

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: Mesha gives Vaishakha. The Sun enters Vrishabha on 13 May, inside the month. The next new moon, 18 May, finds it in Vrishabha and begins Jyeshtha.

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 May, with the Sun in Vrishabha, begins Jyeshtha. Until then this Krishna paksha reads Jyeshtha here, and Vaishakha in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 20 Mar 1920, 07:55 Sat. Since then the Sun has moved 56.6° round the stars. Vikram Samvat numbers that year 1977; Shaka Samvat numbers it 1842.