Panchang in Ipameri, Goiás, Brazil Fri 27 Mar 1964

Purnima follows the tithi at sunrise. Purnima runs from 23:27 on Thu 26 Mar to 23:48 on Fri 27 Mar, so it holds sunrise only on Fri 27 Mar, at 06:18. No text giving Purnima’s time was found; sunrise is Tithika’s convention.

Purnima: every date in Ipameri

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, 06:18 here. Chaturdashi ended at 23:27 Thu, before it. Purnima ends at 23:48, when the lead reaches 180°. The lead passed 0° at the new moon of 13 Mar, so the Moon is waxing: Shukla paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 06:17, came before Chaturdashi ended at 07:57: this day reads Chaturdashi.

Ipameri · UTC−3

Sunrise here, 06:18, came after Chaturdashi ended at 23:27 Thu: this day reads Purnima.

The night of Thu 26 Mar ran from sunset 18:18 Thu to sunrise 06:18, 12 h 0 m. Cut into 15 muhurtas of 48 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:18 to 18:17, 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, 18:17 to 06:18 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′. Uttara Phalguni spans 146°40′–160°00′; the Moon entered its pada 3 at 153°20′. It leaves at 16:04, for Hasta.

Add the Sun's and the Moon's places among the stars: 343.4° + 154.8° = 498.2°, one full turn and 138.2°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 133°20′–146°40′ is the 11th, Vriddhi. It ends at 21:06, then Dhruva.

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 11:34, when the lead reaches 174°; Bava until 23:48.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 06:18 to 06:18 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 Mar 23:13 Fri to 12 Apr 09:37 Sun the Sun stayed in Meena, entering Mesha at 13 Apr 03:22 Mon, after the new moon. A month with no sankranti is Adhika Chaitra, before Chaitra 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 Mar, with the Sun in Meena, began Chaitra (Adhik). This Shukla paksha reads Chaitra (Adhik) in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 13 Mar 1964, 23:13 Fri. Since then the Sun has moved 13.2° round the stars. Vikram Samvat numbers that year 2021; Shaka Samvat numbers it 1886.