Panchang in Ipameri, Goiás, Brazil Sun 25 Sep 1977

Anant Chaturdashi follows the tithi at sunrise. Chaturdashi begins at 06:03 on Sun 25 Sep, after that sunrise, and ends at 05:26 on Mon 26 Sep, before the next: it holds no sunrise. A tithi that holds no sunrise is kept on the day it is current: Sun 25 Sep. No text giving Anant Chaturdashi’s time was found; sunrise is Tithika’s convention.

Anant Chaturdashi: every date in Ipameri

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 144°–156° is the 13th, Shukla Trayodashi. A day takes the tithi in force at its sunrise, 05:59 here. Dwadashi ended at 07:06 Sat, before it. Trayodashi ends at 06:03, when the lead reaches 156°. The lead passed 0° at the new moon of 13 Sep, so the Moon is waxing: Shukla paksha.

A day takes the tithi in force at its sunrise. Chaturdashi began at 06:03 and ended at 05:26 Mon, between the sunrises of 05:59 and 05:59 Mon. Sunday reads Trayodashi and Monday reads Purnima: Chaturdashi is a kshaya tithi here.

The night of Sat 24 Sep ran from sunset 18:09 Sat to sunrise 05:59, 11 h 50 m. Cut into 15 muhurtas of 47 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:59 to 18:09, splits into 8 choghadiyas of 1 h 31 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:09 to 05:59 Mon, splits into 8 choghadiyas of 1 h 28 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′. Shatabhisha spans 306°40′–320°00′; the Moon entered its pada 3 at 313°20′. It leaves at 15:40, for Purva Bhadrapada.

Add the Sun's and the Moon's places among the stars: 158.6° + 314.6° = 473.2°, one full turn and 113.2°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 106°40′–120°00′ is the 9th, Shula. It ends at 17:18, then Ganda.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Trayodashi is Kaulava and the second Taitila. Kaulava ended at 18:32 Sat, when the lead reached 150°; Taitila runs until 06:03.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:59 to 05:59 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: Simha gives Bhadrapada. The Sun enters Kanya on 16 Sep, inside the month. The next new moon, 12 Oct, finds it in Kanya and begins Ashwina.

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 13 Sep, with the Sun in Simha, began Bhadrapada. This Shukla paksha reads Bhadrapada in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 19 Mar 1977, 15:32 Sat. Since then the Sun has moved 183.1° round the stars. Vikram Samvat numbers that year 2034; Shaka Samvat numbers it 1899.