Panchang in Sevan, Gegharkunik, Armenia Mon 13 May 2013

Akshaya Tritiya’s puja is done in purvahna, the first half of the day. Tritiya touches purvahna on both mornings. On Mon 13 May it lasts past the first 3 muhurtas after sunrise (until 08:37), so the Dharmasindhu takes that day: Mon 13 May.

Akshaya Tritiya: every date in Sevan

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 24°–36° is the 3rd, Shukla Tritiya. A day takes the tithi in force at its sunrise, 05:45 here. Dwitiya ended at 08:48 Sun, before it. Tritiya ends at 11:17, when the lead reaches 36°. The lead passed 0° at the new moon of 10 May, so the Moon is waxing: Shukla paksha.

The night of Sun 12 May ran from sunset 20:06 Sun to sunrise 05:45, 9 h 39 m. Cut into 15 muhurtas of 38 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 05:45 to 20:07, 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 night here, 20:07 to 05:44 Tue, splits into 8 choghadiyas of 1 h 12 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′. Mrigashira spans 53°20′–66°40′; the Moon entered its pada 3 at 60°. It leaves at 15:23, for Ardra.

Add the Sun's and the Moon's places among the stars: 28.4° + 61.9° = 90.3°. The sum, cut into 27 parts of 13°20′, gives the yoga: 80°00′–93°20′ is the 7th, Sukarma. It ends at 11:21, then Dhriti.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Tritiya is Taitila and the second Garaja. Taitila ended at 22:02 Sun, when the lead reached 30°; Garaja runs until 11:17.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 05:45 to 05:44 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: Mesha gives Vaishakha. The Sun enters Vrishabha on 14 May, inside the month. The next new moon, 8 Jun, 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 10 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: 10 Apr 2013, 13:35 Wed. Since then the Sun has moved 31.8° round the stars. Vikram Samvat numbers that year 2070; Shaka Samvat numbers it 1935.