Panchang in Chahārbāgh, Alborz Province, Iran Thu 12 May 2022

Smartas test Ekadashi at sunrise: it holds sunrise on Thu 12 May only, at 06:04: Thu 12 May. Vaishnavas test arunodaya: Dashami ended at 18:31 Wed, before it (04:28–06:04).

Mohini Ekadashi: every date in Chahārbāgh

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 120°–132° is the 11th, Shukla Ekadashi. A day takes the tithi in force at its sunrise, 06:04 here. Dashami ended at 18:31 Wed, before it. Ekadashi ends at 17:52, when the lead reaches 132°. The lead passed 0° at the new moon of 1 May, so the Moon is waxing: Shukla paksha.

The night of Wed 11 May ran from sunset 20:01 Wed to sunrise 06:04, 10 h 3 m. Cut into 15 muhurtas of 40 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 06:04 to 20:02, splits into 8 choghadiyas of 1 h 44 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 20:02 to 06:03 Fri, splits into 8 choghadiyas of 1 h 15 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 2 at 150°. It leaves at 18:30, for Hasta.

Add the Sun's and the Moon's places among the stars: 27.2° + 153.1° = 180.3°. The sum, cut into 27 parts of 13°20′, gives the yoga: 173°20′–186°40′ is the 14th, Harshana. It ends at 16:50, then Vajra.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Ekadashi is Vanija and the second Vishti. Vanija runs until 06:17, when the lead reaches 126°; Vishti until 17:52.

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

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: Mesha gives Vaishakha. The Sun enters Vrishabha on 15 May, inside the month. The next new moon, 30 May, finds it in Vrishabha and begins Jyeshtha.

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 1 May, with the Sun in Mesha, began Vaishakha. This Shukla paksha reads Vaishakha in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 1 Apr 2022, 10:54 Fri. Since then the Sun has moved 39.9° round the stars. Vikram Samvat numbers that year 2079; Shaka Samvat numbers it 1944.