Panchang in Sevan, Gegharkunik, Armenia Sun 20 Dec 2015

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 108°–120° is the 10th, Shukla Dashami. A day takes the tithi in force at its sunrise, 08:19 here. Navami ended at 04:13, before it. Dashami ends at 02:01 Mon, when the lead reaches 120°. The lead passed 0° at the new moon of 11 Dec, so the Moon is waxing: Shukla paksha.

The night of Sat 19 Dec ran from sunset 17:35 Sat to sunrise 08:19, 14 h 44 m. Cut into 15 muhurtas of 58 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 08:19 to 17:35, splits into 8 choghadiyas of 1 h 9 m. Their names follow a fixed order that starts from the weekday, and each name is counted good, neutral or bad.

The night here, 17:35 to 08:19 Mon, splits into 8 choghadiyas of 1 h 50 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′. Revati spans 346°40′–360°00′; the Moon entered its pada 3 at 353°20′. It leaves at 18:15, for Ashwini.

Add the Sun's and the Moon's places among the stars: 243.9° + 354.1° = 598°, one full turn and 238°. Past the turn, cut into 27 parts of 13°20′, it gives the yoga: 226°40′–240°00′ is the 18th, Variyana. It ends at 11:30, then Parigha.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Dashami is Taitila and the second Garaja. Taitila runs until 15:08, when the lead reaches 114°; Garaja until 02:01 Mon.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 08:19 to 08:19 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: Vrishchika gives Margashirsha. The Sun enters Dhanu on 16 Dec, inside the month. The next new moon, 10 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 11 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: 20 Mar 2015, 13:36 Fri. Since then the Sun has moved 268.5° round the stars. Vikram Samvat numbers that year 2072; Shaka Samvat numbers it 1937.