Panchang in Atliaca, Guerrero, Mexico Wed 11 Jul 2018

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 05:04 on Wed 11 Jul to 01:31 on Thu 12 Jul, so it touches only Wednesday night’s nishitha (01:21 Thu–02:05 Thu). No text giving Masik Shivratri’s time was found; nishitha is Tithika’s convention.

Masik Shivratri: every date in Atliaca

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, 07:09 here. Trayodashi ended at 05:04, before it. Chaturdashi ends at 01:31 Thu, when the lead reaches 348°. The lead passed 180° at the full moon of 27 Jun, so the Moon is waning: Krishna paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 05:31, came before Trayodashi ended at 15:34: this day reads Trayodashi.

Atliaca · UTC−5

Sunrise here, 07:09, came after Trayodashi ended at 05:04: this day reads Chaturdashi.

The night of Tue 10 Jul ran from sunset 20:16 Tue to sunrise 07:09, 10 h 53 m. Cut into 15 muhurtas of 43 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:09 to 20:16, splits into 8 choghadiyas of 1 h 38 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 20:16 to 07:09 Thu, splits into 8 choghadiyas of 1 h 21 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′. Mrigashira spans 53°20′–66°40′; the Moon entered its pada 3 at 60°. It leaves at 14:13, for Ardra.

Add the Sun's and the Moon's places among the stars: 85° + 62.3° = 147.3°. The sum, cut into 27 parts of 13°20′, gives the yoga: 146°40′–160°00′ is the 12th, Dhruva. It ends at 02:13 Thu, then Vyaghata.

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 15:20, when the lead reaches 342°; Shakuni until 01:31 Thu.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:09 to 07:09 Thu, so the hours after midnight still belong to Budhawara.

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: Vrishabha gives Jyeshtha. The Sun enters Mithuna on 15 Jun, inside the month. The next new moon, 12 Jul, finds it in Mithuna and begins Ashadha.

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 12 Jul, with the Sun in Mithuna, begins Ashadha. Until then this Krishna paksha reads Ashadha here, and Jyeshtha 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 112.2° round the stars. Vikram Samvat numbers that year 2075; Shaka Samvat numbers it 1940.