Panchang in Ipameri, Goiás, Brazil Thu 12 Mar 1964

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 01:52 on Thu 12 Mar to 00:50 on Fri 13 Mar, so only Thursday night’s nishitha (23:59–00:46 Fri) falls within it. No text giving Masik Shivratri’s time was found; nishitha is Tithika’s convention.

Masik Shivratri: 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, 06:14 here. Trayodashi ended at 01:52, before it. Chaturdashi ends at 00:50 Fri, when the lead reaches 348°. The lead passed 180° at the full moon of 27 Feb, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 06:34, came before Trayodashi ended at 10:22: this day reads Trayodashi.

Ipameri · UTC−3

Sunrise here, 06:14, came after Trayodashi ended at 01:52: this day reads Chaturdashi.

The night of Wed 11 Mar ran from sunset 18:30 Wed to sunrise 06:14, 11 h 44 m. Cut into 15 muhurtas of 46 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:14 to 18:29, 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, 18:29 to 06:15 Fri, 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 1 at 306°40′. It leaves at 05:38 Fri, for Purva Bhadrapada.

Add the Sun's and the Moon's places among the stars: 328.5° + 306.7° = 635.2°, one full turn and 275.2°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 266°40′–280°00′ is the 21st, Siddha. It ends at 14:10, then Sadhya.

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 runs until 13:26, when the lead reaches 342°; Shakuni until 00:50 Fri.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:14 to 06:15 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 13 Mar, inside the month. The next new moon, 13 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 13 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: 25 Mar 1963, 09:09 Mon. Since then the Sun has moved 347.7° round the stars. Vikram Samvat numbers that year 2020; Shaka Samvat numbers it 1885.