City-accurate tithi, Rahu Kaal and choghadiya — the daily-return feature every Indian audience site wants.
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POST /v1/panchang/full — tithi, nakshatra, yoga, karana, vara, masa, sunrise/sunset (module reference)POST /v1/panchang/rahu-kaal — Rahu Kaal, Gulika, Yamaganda from the city's own sunrisePOST /v1/muhurta/full — 16 choghadiya periods + Abhijit (Muhurta module)POST /v1/panchang/festivals — computed vrat/festival calendar (Ekadashi, Purnima, major festivals)All times are computed astronomically per lat/lon — a Mumbai widget and a Kolkata widget show genuinely different, correct times.
Panchang data changes once per day per city: fetch at midnight IST per city you serve, cache, and serve unlimited pageviews from your cache. A 50-city national site needs ~200 calls/day — inside the free plan. Hindi + English names (तिथि, नक्षत्र…) come in the same response for bilingual widgets.
Rahu Kaal, choghadiya and even tithi boundaries are anchored to local sunrise/sunset. The API computes from the lat/lon you pass, matching what a local printed panchang shows for that city.
Lahiri ayanamsa (the Indian government standard) with sunrise-anchored day conventions — the mainstream match for North-Indian printed panchangs. Month names support Purnimanta display.
Yes — the festivals endpoint returns computed tithi-based observances (every Ekadashi, Pradosh, Purnima, Amavasya) plus major festivals with dates, so your calendar stays correct every year without manual editing.