Panchang in Myjava, Trenčín Region, Slovakia Tue 27 Apr 1915

Shiva’s Pradosh puja is done in pradosha, the 3 muhurtas after sunset. Trayodashi runs from 01:13 on Tue 27 Apr to 22:23 on Tue 27 Apr, so only Tuesday’s pradosha (18:57–20:53) falls within it. No text giving Pradosh Vrat’s time was found; pradosha is Tithika’s convention.

Pradosh Vrat: every date in Myjava

The Moon gains on the Sun about 12° a day. Each 12° of lead is one tithi: 144°–156° is the 13th, Shukla Trayodashi. A day takes the tithi in force at its sunrise, 04:38 here. Dwadashi ended at 01:13, before it. Trayodashi ends at 22:23, when the lead reaches 156°. The lead passed 0° at the new moon of 14 Apr, so the Moon is waxing: Shukla paksha.

The night of Mon 26 Apr ran from sunset 18:55 Mon to sunrise 04:38, 9 h 43 m. Cut into 15 muhurtas of 38 m, its 14th is Brahma Muhurta, the one before the last.

Daylight here, 04:38 to 18:57, 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, 18:57 to 04:36 Wed, 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′. Uttara Phalguni spans 146°40′–160°00′; the Moon entered its pada 4 at 156°40′. It leaves at 06:13, for Hasta.

Add the Sun's and the Moon's places among the stars: 13.1° + 159° = 172.1°. The sum, cut into 27 parts of 13°20′, gives the yoga: 160°00′–173°20′ is the 13th, Vyaghata. It ends at 06:26, then Harshana.

A karana is half a tithi: 6° of the Moon's lead, so the first half of Trayodashi is Kaulava and the second Taitila. Kaulava runs until 11:52, when the lead reaches 150°; Taitila until 22:23.

A Hindu day runs from one sunrise to the next, not midnight to midnight. This one runs 04:38 to 04:36 Wed, so the hours after midnight still belong to Mangalawara.

A month normally holds one sankranti, the Sun's entry into a new rashi. From 14 Apr 12:35 Wed to 14 May 04:30 Fri the Sun stayed in Mesha, entering Vrishabha at 14 May 14:42 Fri, after the new moon. A month with no sankranti is Adhika Vaishakha, before Vaishakha itself.

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 14 Apr, with the Sun in Mesha, began Vaishakha (Adhik). This Shukla paksha reads Vaishakha (Adhik) in both counts.

A samvat year begins with Chaitra, the month whose new moon finds the Sun in Meena: 15 Mar 1915, 20:41 Mon. Since then the Sun has moved 41.6° round the stars. Vikram Samvat numbers that year 1972; Shaka Samvat numbers it 1837.