Panchang in Codcod, Western Visayas, Philippines Fri 25 Feb 1983

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 03:08 on Fri 25 Feb to 23:48 on Fri 25 Feb, so only Friday’s pradosha (17:56–20:22) 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, 06:04 here. Dwadashi ended at 03:08, before it. Trayodashi ends at 23:48, when the lead reaches 156°. The lead passed 0° at the new moon of 13 Feb, so the Moon is waxing: Shukla paksha.

The night of Thu 24 Feb ran from sunset 17:56 Thu to sunrise 06:04, 12 h 8 m. Cut into 15 muhurtas of 48 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:04 to 17:56, 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 night here, 17:56 to 06:03 Sat, 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 fixed stars divide the Moon's path into 27 nakshatras of 13°20′, each in 4 padas of 3°20′. Pushya spans 93°20′–106°40′; the Moon entered its pada 2 at 96°40′. It leaves at 20:17, for Ashlesha.

Add the Sun's and the Moon's places among the stars: 312.1° + 97.8° = 409.9°, one full turn and 49.9°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 40°00′–53°20′ is the 4th, Saubhagya. It ends at 11:12, then Shobhana.

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 13:29, when the lead reaches 150°; Taitila until 23:48.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:04 to 06:03 Sat, so the hours after midnight still belong to Shukrawara.

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 13 Feb, with the Sun in Kumbha, began Phalguna (Adhik). This Shukla paksha reads Phalguna (Adhik) in both counts.

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 331.3° round the stars. Vikram Samvat numbers that year 2039; Shaka Samvat numbers it 1904.