Panchang in Myshkin, Yaroslavl Oblast, Russia Mon 5 Mar 2018

The Sankashti fast is broken at moonrise. Chaturthi runs from 22:37 on Sun 4 Mar to 22:09 on Mon 5 Mar, between the two nights’ moonrise, touching neither. The Dharmasindhu then takes the later day: Mon 5 Mar. No text giving Sankashti Chaturthi’s time was found; moonrise is Tithika’s convention.

Sankashti Chaturthi: every date in Myshkin

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 216°–228° is the 19th, Krishna Chaturthi. A day takes the tithi in force at its sunrise, 07:10 here. Tritiya ended at 22:37 Sun, before it. Chaturthi ends at 22:09, when the lead reaches 228°. The lead passed 180° at the full moon of 2 Mar, so the Moon is waning: Krishna paksha.

The night of Sun 4 Mar ran from sunset 18:03 Sun to sunrise 07:10, 13 h 7 m. Cut into 15 muhurtas of 52 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 07:10 to 18:05, splits into 8 choghadiyas of 1 h 21 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 18:05 to 07:07 Tue, splits into 8 choghadiyas of 1 h 37 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 17:47, for Swati.

Add the Sun's and the Moon's places among the stars: 320.4° + 180.8° = 501.2°, one full turn and 141.2°. 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 16:19, then Dhruva.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Chaturthi is Bava and the second Balava. Bava runs until 10:18, when the lead reaches 222°; Balava until 22:09.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 07:10 to 07:07 Tue, so the hours after midnight still belong to Somawara.

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: Kumbha gives Phalguna. The Sun enters Meena on 14 Mar, inside the month. The next new moon, 17 Mar, finds it in Meena and begins Chaitra.

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 Mar, with the Sun in Meena, begins Chaitra. Until then this Krishna paksha reads Chaitra here, and Phalguna in the amanta count.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 28 Mar 2017, 05:57 Tue. Since then the Sun has moved 336.9° round the stars. Vikram Samvat numbers that year 2074; Shaka Samvat numbers it 1939.