Panchang in Codcod, Western Visayas, Philippines Fri 31 Aug 2012

Purnima follows the tithi at sunrise. Purnima runs from 22:41 on Thu 30 Aug to 21:58 on Fri 31 Aug, so it holds sunrise only on Fri 31 Aug, at 05:37. No text giving Purnima’s time was found; sunrise is Tithika’s convention.

Purnima: every date in Codcod

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 168°–180° is the 15th, Shukla Purnima. A day takes the tithi in force at its sunrise, 05:37 here. Chaturdashi ended at 22:41 Thu, before it. Purnima ends at 21:58, when the lead reaches 180°. The lead passed 0° at the new moon of 17 Aug, so the Moon is waxing: Shukla paksha.

The night of Thu 30 Aug ran from sunset 17:57 Thu to sunrise 05:37, 11 h 40 m. Cut into 15 muhurtas of 46 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:37 to 17:57, splits into 8 choghadiyas of 1 h 32 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 05:37 Sat, splits into 8 choghadiyas of 1 h 27 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 4 at 303°20′. It leaves at 07:46, for Shatabhisha.

Add the Sun's and the Moon's places among the stars: 133.9° + 305.5° = 439.4°, one full turn and 79.4°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 66°40′–80°00′ is the 6th, Atiganda. It ends at 06:44, then Sukarma.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Purnima is Vishti and the second Bava. Vishti runs until 10:16, when the lead reaches 174°; Bava until 21:58.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:37 to 05:37 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 17 Aug 23:54 Fri to 16 Sep 10:10 Sun the Sun stayed in Simha, entering Kanya at 16 Sep 20:24 Sun, after the new moon. A month with no sankranti is Adhika Bhadrapada, before Bhadrapada 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 Aug, with the Sun in Simha, began Bhadrapada (Adhik). This Shukla paksha reads Bhadrapada (Adhik) in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 22 Mar 2012, 22:37 Thu. Since then the Sun has moved 155.6° round the stars. Vikram Samvat numbers that year 2069; Shaka Samvat numbers it 1934.