Panchang in Codcod, Western Visayas, Philippines Tue 29 May 2007

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 03:23 on Tue 29 May to 05:38 on Wed 30 May, so only Tuesday’s pradosha (18:05–20:20) falls within it. No text giving Pradosh Vrat’s time was found; pradosha is Tithika’s convention.

Pradosh Vrat: every date in Codcod

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, 05:24 here. Dwadashi ended at 03:23, before it. Trayodashi ends at 05:38 Wed, when the lead reaches 156°. The lead passed 0° at the new moon of 17 May, so the Moon is waxing: Shukla paksha.

A day takes the tithi in force at its sunrise. Trayodashi began at 03:23, before sunrise at 05:24, and ends at 05:38 Wed, after the next sunrise at 05:24 Wed. Both days read Trayodashi: it is a vriddhi tithi here.

The night of Mon 28 May ran from sunset 18:04 Mon to sunrise 05:24, 11 h 20 m. Cut into 15 muhurtas of 45 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:24 to 18:05, splits into 8 choghadiyas of 1 h 35 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:05 to 05:24 Wed, splits into 8 choghadiyas of 1 h 24 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′. Swati spans 186°40′–200°00′; the Moon entered its pada 1 at 186°40′. It leaves at 05:16 Wed, for Vishakha.

Add the Sun's and the Moon's places among the stars: 43.2° + 188.1° = 231.3°. The sum, cut into 27 parts of 13°20′, gives the yoga: 226°40′–240°00′ is the 18th, Variyana. It ends at 21:33, then Parigha.

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 runs until 16:33, when the lead reaches 150°; Taitila until 05:38 Wed.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:24 to 05:24 Wed, so the hours after midnight still belong to Mangalawara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 17 May 03:27 Thu to 15 Jun 11:13 Fri the Sun stayed in Vrishabha, entering Mithuna at 15 Jun 18:22 Fri, after the new moon. A month with no sankranti is Adhika Jyeshtha, before Jyeshtha 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 17 May, with the Sun in Vrishabha, began Jyeshtha (Adhik). This Shukla paksha reads Jyeshtha (Adhik) in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 19 Mar 2007, 10:42 Mon. Since then the Sun has moved 69° round the stars. Vikram Samvat numbers that year 2064; Shaka Samvat numbers it 1929.