Panchang in Codcod, Western Visayas, Philippines Sat 12 Mar 1983

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 20:34 on Fri 11 Mar to 22:44 on Sat 12 Mar, so only Saturday’s pradosha (17:57–20:21) falls within it. No text giving Pradosh Vrat’s time was found; pradosha is Tithika’s convention.

Pradosh Vrat: every date in Codcod

Shiva’s worship centres on nishitha, the midnight muhurta. Chaturdashi runs from 22:44 on Sat 12 Mar to 00:28 on Mon 14 Mar, holding as much of nishitha on both nights. The Nirnayasindhu then takes the earlier: Sat 12 Mar. 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: 324°–336° is the 28th, Krishna Trayodashi. A day takes the tithi in force at its sunrise, 05:56 here. Dwadashi ended at 20:34 Fri, before it. Trayodashi ends at 22:44, when the lead reaches 336°. The lead passed 180° at the full moon of 27 Feb, so the Moon is waning: Krishna paksha.

The night of Fri 11 Mar ran from sunset 17:57 Fri to sunrise 05:56, 11 h 59 m. Cut into 15 muhurtas of 47 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:56 to 17:57, splits into 8 choghadiyas of 1 h 30 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:57 to 05:56 Sun, splits into 8 choghadiyas of 1 h 29 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′. Dhanishtha spans 293°20′–306°40′; the Moon entered its pada 1 at 293°20′. It leaves at 04:20 Sun, for Shatabhisha.

Add the Sun's and the Moon's places among the stars: 327.1° + 295.4° = 622.5°, one full turn and 262.5°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 253°20′–266°40′ is the 20th, Shiva. It ends at 13:32, then Siddha.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Trayodashi is Garaja and the second Vanija. Garaja runs until 09:42, when the lead reaches 330°; Vanija until 22:44.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:56 to 05:56 Sun, so the hours after midnight still belong to Shaniwara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 13 Feb 08:31 Sun to 15 Mar 01:43 Tue the Sun stayed in Kumbha, entering Meena at 15 Mar 02:44 Tue, after the new moon. A month with no sankranti is Adhika Phalguna, before Phalguna itself.

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 15 Mar, with the Sun in Kumbha, begins Phalguna (Adhik). Until then this Krishna paksha reads Phalguna (Adhik) here, and Phalguna (Adhik) in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 25 Mar 1982, 18:17 Thu. Since then the Sun has moved 346.3° round the stars. Vikram Samvat numbers that year 2039; Shaka Samvat numbers it 1904.