Panchanga (五支曆)

Vedic Panchanga (五支曆) — the Hindu daily almanac, the most-used artifact in all of Jyotish and the foundation our rashi/nakshatra/bindu/varga suite was missing. From a date/time + place it computes the FIVE LIMBS (पञ्च-अङ्ग): tithi (the lunar day 1–30, with paksha & 5-fold nature), vara (the weekday & its planetary lord), nakshatra (the Moon's mansion 1–27, with pada & Vimshottari lord), yoga (the Sun+Moon nitya yoga 1–27) and karana (the half-tithi). Each limb is given both at the query instant and at local sunrise (the canonical labelled value), plus the intra-day TRANSITION END-TIMES (the 'Tithi until HH:MM' when each limb gives way to the next), and the published day-quality windows — Rahu Kala, Yamaganda, Gulika Kala (inauspicious), the Abhijit muhurta and the planetary hora. Drik-ganita true positions on the Lahiri sidereal zodiac, cross-checked against a gold-standard chart (end-times matching the published drik-panchang to ~1 min); the math is exact, the auspiciousness symbolic.

Cost: 6 TIAN Points per call. tRPC procedure panchanga.compute.