Panchang in Chahārbāgh, Alborz Province, Iran Tue 18 Dec 2018

Gita Jayanti follows the tithi at sunrise. Ekadashi runs from 05:57 on Tue 18 Dec to 05:35 on Wed 19 Dec, so it holds sunrise only on Tue 18 Dec, at 07:11. No text giving Gita Jayanti’s time was found; sunrise is Tithika’s convention.

Gita Jayanti: every date in Chahārbāgh

Smartas test Ekadashi at sunrise: it holds sunrise on Tue 18 Dec only, at 07:11: Tue 18 Dec.

Mokshada 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, 07:11 here. Dashami ended at 05:57, before it. Ekadashi ends at 05:35 Wed, when the lead reaches 132°. The lead passed 0° at the new moon of 7 Dec, so the Moon is waxing: Shukla paksha.

A day takes the tithi in force at its sunrise.

New Delhi · IST

Sunrise here, 07:07, came before Dashami ended at 07:57: this day reads Dashami.

Chahārbāgh · UTC+3:30

Sunrise here, 07:11, came after Dashami ended at 05:57: this day reads Ekadashi.

The night of Mon 17 Dec ran from sunset 16:55 Mon to sunrise 07:11, 14 h 16 m. Cut into 15 muhurtas of 57 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:11 to 16:55, splits into 8 choghadiyas of 1 h 13 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 16:55 to 07:11 Wed, splits into 8 choghadiyas of 1 h 47 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′. Ashwini spans 0°00′–13°20′; the Moon entered its pada 1 at 0°. It leaves at 02:37 Wed, for Bharani.

Add the Sun's and the Moon's places among the stars: 242° + 2.7° = 244.7°. The sum, cut into 27 parts of 13°20′, gives the yoga: 240°00′–253°20′ is the 19th, Parigha. It ends at 21:50, then Shiva.

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 17:52, when the lead reaches 126°; Vishti until 05:35 Wed.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:11 to 07:11 Wed, so the hours after midnight still belong to Mangalawara.

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: Vrishchika gives Margashirsha. The Sun enters Dhanu on 16 Dec, inside the month. The next new moon, 6 Jan, finds it in Dhanu and begins Pausha.

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 7 Dec, with the Sun in Vrishchika, began Margashirsha. This Shukla paksha reads Margashirsha in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 17 Mar 2018, 16:41 Sat. Since then the Sun has moved 269.2° round the stars. Vikram Samvat numbers that year 2075; Shaka Samvat numbers it 1940.