Articles

How the Hindu calendar and Vedic astrology are actually computed, with worked examples you can reproduce through the API.

How to choose a Vedic astrology API: a checklist for developers

Nine checks before you build on an astrology API: location-aware panchang, verified festival dates, an ephemeris you can audit, real response examples, timezone handling, languages, pricing, AI-agent access and a way to reproduce every number.

Panchang API or Swiss Ephemeris yourself? What the ephemeris does not give you

The Swiss Ephemeris gives planet positions. A panchang needs sunrise rules, tithi segments, kshaya and vriddhi, festival observance moments, month naming and timezones on top. What each layer costs to build, and when an API is the better call.

Why Hindu festival dates differ by city

Diwali 2027 is on 29 October in New Delhi but 28 October in Toronto. How tithis, local sunrise, moonrise and observance rules move festival dates, with worked examples and the API calls to reproduce them.