Panchang in Codcod, Western Visayas, Philippines Wed 10 Feb 2021

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 04:35 on Wed 10 Feb to 03:39 on Thu 11 Feb, so only Wednesday night’s nishitha (23:36–00:25 Thu) falls within it. No text giving Masik Shivratri’s time was found; nishitha is Tithika’s convention.

Masik Shivratri: every date in Codcod

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, 06:08 here. Trayodashi ended at 04:35, before it. Chaturdashi ends at 03:39 Thu, when the lead reaches 348°. The lead passed 180° at the full moon of 29 Jan, so the Moon is waning: Krishna paksha.

The night of Tue 9 Feb ran from sunset 17:53 Tue to sunrise 06:08, 12 h 15 m. Cut into 15 muhurtas of 49 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:08 to 17:54, 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 night here, 17:54 to 06:08 Thu, 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 fixed stars divide the Moon's path into 27 nakshatras of 13°20′, each in 4 padas of 3°20′. Uttara Ashadha spans 266°40′–280°00′; the Moon entered its pada 3 at 273°20′. It leaves at 16:41, for Shravana.

Add the Sun's and the Moon's places among the stars: 297.2° + 274° = 571.2°, one full turn and 211.2°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 200°00′–213°20′ is the 16th, Siddhi. It ends at 09:31, then Vyatipata.

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 16:05, when the lead reaches 342°; Shakuni until 03:39 Thu.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:08 to 06:08 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: Dhanu gives Pausha. The Sun enters Makara on 14 Jan, inside the month. The next new moon, 12 Feb, finds it in Makara and begins Magha.

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 Feb, with the Sun in Makara, begins Magha. Until then this Krishna paksha reads Magha here, and Pausha in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 24 Mar 2020, 17:28 Tue. Since then the Sun has moved 317.1° round the stars. Vikram Samvat numbers that year 2077; Shaka Samvat numbers it 1942.