Panchang in Baoding, Hebei, China Sun 19 Apr 1981

Hanuman Jayanti follows the tithi at sunrise. Purnima runs from 13:44 on Sat 18 Apr to 15:58 on Sun 19 Apr, so it holds sunrise only on Sun 19 Apr, at 05:36. No text giving Hanuman Jayanti’s time was found; sunrise is Tithika’s convention.

Hanuman Jayanti: every date in Baoding

Purnima follows the tithi at sunrise. Purnima runs from 13:44 on Sat 18 Apr to 15:58 on Sun 19 Apr, so it holds sunrise only on Sun 19 Apr, at 05:36. No text giving Purnima’s time was found; sunrise is Tithika’s convention.

Purnima: every date in Baoding

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, 05:36 here. Chaturdashi ended at 13:44 Sat, before it. Purnima ends at 15:58, when the lead reaches 180°. The lead passed 0° at the new moon of 5 Apr, so the Moon is waxing: Shukla paksha.

The night of Sat 18 Apr ran from sunset 18:57 Sat to sunrise 05:36, 10 h 39 m. Cut into 15 muhurtas of 42 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:36 to 18:58, splits into 8 choghadiyas of 1 h 40 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:58 to 05:35 Mon, splits into 8 choghadiyas of 1 h 19 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′. Chitra spans 173°20′–186°40′; the Moon entered its pada 3 at 180°. It leaves at 18:10, for Swati.

Add the Sun's and the Moon's places among the stars: 5.2° + 180.4° = 185.6°. The sum, cut into 27 parts of 13°20′, gives the yoga: 173°20′–186°40′ is the 14th, Harshana. It ends at 07:37, then Vajra.

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 ended at 02:50, when the lead reached 174°; Bava runs until 15:58.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:36 to 05:35 Mon, so the hours after midnight still belong to Raviwara.

An amanta month runs from new moon to new moon and takes its name from the rashi the Sun is in at the new moon that begins it: Meena gives Chaitra. The Sun enters Mesha on 13 Apr, inside the month. The next new moon, 4 May, finds it in Mesha and begins Vaishakha.

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 5 Apr, with the Sun in Meena, began Chaitra. This Shukla paksha reads Chaitra in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 5 Apr 1981, 04:19 Sun. Since then the Sun has moved 13.8° round the stars. Vikram Samvat numbers that year 2038; Shaka Samvat numbers it 1903.